10 Best Kids Detective Kit

Kids Detective Kit. We look at thousands of unbiased or high-quality reviewers around ecommerce sites such as Amazon, Walmart, Home Depot, Wayfair, etc. We analyze from customer experience of the product to find out if these products are worth the spend. We make comparisons, to give readers real insights into how different brands and models measure up against each other.

We do the research ourselves by analyzing reviews and ratings from customers, to help you purchase wiser to avoid buyer’s remorse.

Our list of the Best Kids Detective Kit

Table of Contents show

Spy Kit for Kids Detective Outfit Fingerprint Toys Gifts for 5 6 7 8 9 10 11 Year Old Boys Girls Investigation Role Play Dress Up Costume Educational Science Secret Agent Finger Print Identification

$26.99  in stock
Amazon.com
as of May 17, 2022 1:45 pm

Features

  • Wonderful detective role play kit, to learn how to detect and collect fingerprints just like a forensics expert. Each activity will have you acting and thinking like a real forensic scientist.
  • Seek and Analyze Fingerprints. Kids can step-by-step guided through booklets to collect fingerprints. they can use this set to create fascinating detective activities such as do fingerprint extraction and matching. Create crime scenes, reveal hidden messages, and identify fingerprints.
  • Spy costume set includes spy glasses, hat, jacket, magnifying glass. Cool detective equipment with spy function. Indispensable for undercover investigations. Integrated mirrors allow inconspicuous shading.
  • It nurtures the intellectual side of their curiosity. This, in turn, pushes them to ask questions and learn to understand what’s going on around them. To teach and encourage learning in a wide area of connected sciences and STEM.
  • Doing the experiment by own hand, let your little one enjoy the fun from the experiment. It also can cultivate children's observation ability and scientific exploration spirit. Recommended for children 6 years of age and older. [Not include the powder and iodine for fingerprint collection]

Playz Detective Spy Kit for Kids - 15 Mystery & Forensic Experiments, Science Toys, & STEM Projects for Kids Ages 8-12 - Investigate Crime Scenes, Solve Mysteries, Decode Secret Messages, Extract DNA

$39.99  in stock
Amazon.com
as of May 17, 2022 1:45 pm

Features

  • FUN FOR ALL - Solve mysteries with your handy, all-in-one detective kit - among the best forensic science gifts loved by all ages, perfect for adults who are looking for a compelling game to play with their kids.
  • CRACK THE CODE, SOLVE THE CASE - Conduct 15 forensic experiments with a complete science kit bundled in a spy gear suit case that includes a top secret envelope, magnifying glass, crime scene tape, & more for an absolute real play experience.
  • THINK LIKE A TRUE DETECTIVE - Investigate the crime scene, decode secret messages, analyze fingerprint samples, extract DNA, mold footprints, and finally catch the culprit with the help of a 36-page visual & fact-filled guide.
  • REAL STEM LEARNING - Kids learn best thru Playz! Our brilliant activity kits bring Science, Technology, Engineering, and Math to life, with top secret missions that foster curiousity, experimentation, & deductive reasoning.
  • TRUST OUR PLAYZ PROMISE - 100% Satisfaction Guarantee! You know the quality you will get when purchasing a Playz product. If you are unhappy with your purchase, contact us anytime for a refund.

Alex Undercover Spy Case Detective Gear Set Kids Spy Kit

$33.00
$26.99
 in stock
2 new from $26.99
Free shipping
Amazon.com
as of May 17, 2022 1:45 pm

Features

  • Everything for the super sleuth on the go
  • Travel with all of your detective gear
  • Winner of Dr Toy's best vacation products award
  • Includes case, ink pad, binoculars, flashlight, magnifying glass, fingerprint powder and brush, marker pen set, code files with booklet and batteries
  • Recommended for children age 8 and up

Thames & Kosmos Master Detective Toolkit | Forensic Science Experiment Kit | Fingerprints, Footprints, Tire Tracks | 32-Page, Full-Color Experiment Story Book | Parents' Choice Gold Award Winner

$49.95  in stock
8 new from $45.40
Free shipping
Amazon.com
as of May 17, 2022 1:45 pm

Features

  • Learn about how detectives use forensic science to answer questions, gather evidence, and solve crimes
  • Experiment with the equipment and techniques used by real detectives
  • Learn about securing a crime scene, and gathering and documenting evidence, including fingerprints, footprints, and tire tracks
  • As your detective skills develop, you can use them to solve the MOCK crime presented in the manual
  • The 32-page, full-color experiment book guides your Investigations with rich illustrations and step-by-step instructions

Project MC2 Pretend Play Super Spy Gear STEM Science Kit, Become a Human Lie Detector with Detective Finger Print Identification Set, Crime Scene Tape, Magnifying Glass, Spy Notebook & More Stuff

$19.99
$16.23
 in stock
2 new from $16.23
3 used from $10.41
Free shipping
Amazon.com
as of May 17, 2022 1:45 pm

Features

  • Agents in training: includes everything you need to start your first investigation!
  • S.T.E.A.M.: hone in on critical thinking, observation and problem solving skills through fingerprint identification, crime scene processing and suspect elimination
  • Imaginary & role play: unleash your child's imagination as they follow along with their favorite secret agents from the NOV8 team! Create crime scenes, reveal hidden messages and identify fingerprints
  • Spy set includes: black light pen, fingerprint brush, ink pad, magnifying glass, secret spy notepad, cornstarch, crime scene tape, peel & stick acetate stickers, and easy-to-follow instructions
  • Age range: 6 years & up

WILD! Science WS103XL Crime Scene Investigation - Forensic Science Kit - Ages 8+ - Match Fingerprints, Analyze DNA, Find Secret Messages and More!

$29.99  in stock
2 new from $29.99
5 used from $8.76
Free shipping
Amazon.com
as of May 17, 2022 1:45 pm

Features

  • BECOME A DETECTIVE AT HOME -- Match fingerprints, test DNA, identify fibers, test water for poisons, cast footprints and discover secret messages! Set the scene with the included crime scene tape!
  • REAL EVIDENCE-GATHERING TECHNIQUES -- Discover how detectives use forensic science to collect and examine crime scene evidence. Children will love to catch the culprit!
  • FORENSIC STEM FOR AGES 8+ -- Use chromatography to extract evidence from DNA analyses, test acids and alkalis to discover secret writing, examine fingerprint characteristics and so much more.
  • ENDLESS FUN FOR THE WHOLE FAMILY -- With this detective kit, kids will love to create new criminal stories again and again! Who's stealing all the cookies from the jar? Who took my favorite toy?
  • 66 PIECES -- This CSI kit features tools and ingredients for each experiment. Some household items are required: paper, plate, scissors, old shoes and sweaters, mirror/shiny surface and a glass.

Melissa & Doug On the Go Secret Decoder Deluxe Activity Set and Super Sleuth Toy

$15.09
$8.99
 in stock
13 new from $8.99
Free shipping
Amazon.com
as of May 17, 2022 1:45 pm

Features

  • PROBLEM SOLVERS, UNITE!: The Melissa & Doug On the Go Secret Decoder Deluxe Activity Set gives kids a chance to crack codes, uncover hidden clues, reveal secret messages, and be super sleuths!
  • ACTIVITIES GALORE: 50+ activities include a Secret Decoder Game Book, Seek & Find Game Book, Secret Message Activity Pad, and magic-reveal sticker sheets.
  • PLAY AND LEARN: This robust activity set encourages problem solving and critical thinking.
  • GREAT GIFT FOR AGES 7 TO 9: This set makes a delightful and educational gift for kids ages 7 to 9. Add the Melissa & Doug Game On! Travel Activity Pad Game to round out the hands-on play experience and give kids another engaging option for screen-free fun.
  • “THE GOLD STANDARD IN CHILDHOOD PLAY”: For more than 30 years, Melissa & Doug has created beautifully designed imagination- and creativity-sparking products that NBC News called “the gold standard in early childhood play.”

BOTINDO Spy Kit for Kids Detective Fingerprint Identification Set - Scene Investigation Science Experiment Print Identification Kit Educational Toys for Boys & Girls Age

 out of stock
Amazon.com
as of May 17, 2022 1:45 pm

Features

  • Fingerprint Kit Includes: 1*Spy glasses, 1*Magnifying glass, 1*Bulb bottle, 1*Small dish, 1*Tweezers, 1*Candle, 1*Brush, 1*Blower, 1*Clear fingerprint tape, 1*Invisible spy pen with LED UV light, 1*Fingerprint pad,1*Warning seal, 2* stamp pads, 6*Evidence cards,1*Case record card book and 1*Guide book.(22pc)
  • Imaginary & Experiment: Like a super spy gathering up evidence to solve a case! Kids detective set encourages children to ask questions. Use spy set tools to collect evidence,cultivate curiosity and promote intellectual development.
  • Detective Role-Playing Kit: By collecting fingerprints at the crime scene,identifying suspects,honing children's observation and problem-solving skills.Spy stuff toys for kids conduct an investigation right in your own home!
  • Interesting Training Activities: We provide detailed color instructions,which make it easy for your kids to perform fun science activities.Spy costume case for boys and girls aged 8 and up.
  • Educational Gifts: Spy science kits are ideal great gifts for Birthday,Children's day, Christmas, Thanksgiving, Easter, holiday and other occasions for any child who loves detective work and interested in becoming an investigator.

BLOONSY Spy Kit for Kids Detective Fingerprint Toys for 6 7 8 9 10 11 12 Year Old Boys Girls Secret Agent Investigation Science Set

$19.97  in stock
Amazon.com
as of May 17, 2022 1:45 pm

Features

  • A KIT FOR YOUNG SPIES: Get your kid to fall in love with the world of spies and detectives with this fun STEM toy. The Young Detective Kit allows children to experiment, explore their environment and learn the techniques and tools detectives use to solve crimes, collect evidence and catch the bad guys.
  • THE PERFECT TOY FOR KIDS WHO ARE EAGER TO LEARN / CURIOUS KIDS: Our Spy Kit is designed for children who want to get to know the tools and methods that real-life spies use for solving mysteries. This STEM toy is a great spy training that teaches kids to record and match fingerprints, check the authenticity of money and much more spy stuff. No criminals will get past your young spy!
  • HOURS OF FUN, FOCUS AND IMAGINATION: The Spy Kit offers many different activities for children to engage in, so they can focus on this interactive toy instead of their computer screen. Hours of fun and imagination are guaranteed as there’s a lot to investigate! It will keep your kids inspired, engaged and entertained while teaching them the basics of critical thinking and encouraging them to experiment.
  • DEVELOPS IMAGINATION, CRITICAL THINKING AND CONCENTRATION: This detective kit for kids is child-friendly and comes with a simple-to-follow booklet explaining how to use the kids spy kit to get the ultimate experience. It’s easy to use and allows your children to develop their critical thinking skills, improve their focus and work on their imagination all while playing.
  • A DELUXE KIT FOR BEGINNER SPIES: If your kid wants to become a spy, this top-quality toy set has everything they need. The kit offers many experiments and activities, providing kids with hours of fun and learning. It introduces children to science experiments to help them develop critical thinking and sharp focus. It encourages children to develop their imagination and creativity while roleplaying.

SpyX / Micro Gear Set - 4 Real Spy Toys Kit + Adjustable Belt for Spy Kids Role Play. Junior Secret Agent / Detective / Ninja Toy Gadgets Set for Boys & Girls

$39.99  in stock
11 new from $38.99
Free shipping
Amazon.com
as of May 17, 2022 1:45 pm

Features

  • Perfect Spy Toy Gadgets: 4 cool & real spy tools for kids: Micro Ear Light, Invisible Ink Pen, Micro Motion Alarm & Micro Listener plus adjustable utility belt for spy kids with endless activities of spy role play!
  • Product of the Year: Creative Child Magazine for Product of the Year award winner! Spy science kit designed for spy kids to use different stylish spy gears & complete secret mission! Educational & fun Spy costume set for ages 6 and up.
  • All You Need to Become a Spy: With this bundle of 4 unique spy surveillances, your junior secret agent will be able to see in the dark, read & write secret messages, protect their lair, and listen to secret conversations from afar!
  • Carry All the Spy Gears: The hand-free spy gear set includes adjustable utility belt with attached clips to carry your spy stuffs so you're ready to spy at any time!
  • Prepare Yourself for the Next Mission: Collect all 28 SpyX toys for the ultimate jr spy/detective/ninja activities! Perfect Halloween / Christmas / Thanksgiving / Birthday spy toy gifts for boys & girls!

New releases on Amazon:

New
Thames & Kosmos Master Detective Toolkit V2 | Forensic Science Experiment Kit | Gather & Document Evidence, Play Detective | Fingerprints, Footprints, Tire Tracks | 32-Page Experiment Storybook
  • Join Spy Labs Incorporated and become a master spy with this interactive detective kit for ages 8 and up.
  • Learn important detective skills like how to use forensic science to answer questions, gather evidence, and solve crimes.
  • Use the detective tools included to find and lift fingerprints, write secret messages in disappearing ink, and decipher top-secret codes.
  • Solve the included practice cases or use the spy tools on your own for creative scientific fun as you hone your observation skills.
  • The kit includes several tools such as a UV light, disappearing ink, fingerprint powder, a crime scene notepad, and more!
New
Plugo Detective by PlayShifu - Kids Spy Kit with Thrilling Games | Boost STEM Skills | Gift for Boys & Girls 4-10 Years (Works with iPads, iPhones, Samsung Tablets/Phones, Kindle Fire Tablets)
  • Plugo Detective by PlayShifu is an AR-powered innovative spy kit for ages 4-10 years. STEM, STEAM, and beyond – enhance observation, problem-solving, and deduction skills by solving mind-boggling whodunnits.
  • HOW IT WORKS - The front camera of your device reads the movements on the kit. Use Gizmo Max to inspect the crime scene, find clues, store evidence, unlock doors with secret codes, and catch the culprits to become the best crime-solver in town!
  • PLUGO APP - Download the free Plugo app to unlock 3 interactive story-based games and 100+ levels that increase in difficulty as you play. Make screen time meaningful and help Sarah Spyglass, Agent Hoot, and Junkyard Cockroach solve mysteries.
  • IN THE BOX - Gizmo Max with a slider base and lock, 4 special lenses, 6 clue cards, 1 Gamepad.
  • COMPATIBLE DEVICES - iOS - iPad 5th gen or newer, all models of iPad Pro (except Pro 12.9"), all models of iPad Air, iPad Mini 2nd gen or newer, iPhone 6 or newer | Android - Samsung devices: 2015 and newer, 2GB RAM and above [Samsung Tab S7, S7 Plus, A 10.5 not supported] | Amazon Fire - 7 HD 2019, Fire 8 HD 2018 and 2020 [Fire 10 not supported]
SaleNew
STICKY LIL FINGERS SuperSpies Secret Agent Spymaster Kit - Investigation Role Play Toys & Gifts for 5 6 7 8 9 10 11 Year Old Kids - Motion Alarm Secret Spy Pen Mission Goggles Surveillance Listener
  • COMPLETE SPY GADGETS SET: With this spy gear set boys and girls can enjoy the full experience of being a superspy! With all the must-have tools to pull off a successful investigation, they'll be making discoveries and on their way to saving the world in no time at all.
  • SURVEILLANCE TOOLS: This spy set allows your little one to stay one step ahead of their targets by including valuable surveillance gadgets. With the motion detector alarm they can know when their enemies are close, and the listener device allows them to pick up valuable intel from conversations.
  • READY FOR ACTION: The detonator disk launcher in this spy tools kit means that the kids will be ready for any hairy situation. They'll marvel at the high-velocity disks they can fire at their targets, ready for combat if they get detected whilst carrying out a mission!
  • SECRET MESSAGES & MISSION GOGGLES: The secret spy pen that comes with this ultimate spy mission set allows your son or daughter to create special secret messages that only they can see. The light-up mission goggles help to complete the look, while the LED lights allow them to see in the dark.
  • LICENSE AND BELT: With this secret agent kit we provide one of our adjustable spy belts for them to carry their gadgets, also including a special license-to-spy agent's badge. This adds a dimension to the costume that will truly activate your child's imagination beyond simply playing dress-up.
New
Playz Detective Spy Gear Kit for Kids - 15 Mystery & Forensic Experiment Gadgets, Science Toys, & Spy Ninja STEM Projects for Kids Ages 8-12 - Inspect Crime Scenes, Decode Secret Messages, Extract DNA
  • FUN FOR ALL - Solve mysteries with your handy, all-in-one detective kit - among the best forensic science gifts loved by all ages, perfect for adults who are looking for a compelling game to play with their kids.
  • CRACK THE CODE, SOLVE THE CASE - Conduct 15 forensic experiments with a complete science kit bundled in a spy gear suit case that includes a top secret envelope, magnifying glass, crime scene tape, & more for an absolute real play experience.
  • THINK LIKE A TRUE DETECTIVE - Investigate the crime scene, decode secret messages, analyze fingerprint samples, extract DNA, mold footprints, and finally catch the culprit with the help of a 36-page visual & fact-filled guide.
  • REAL STEM LEARNING - While other companies 'claim' their top kid's toys are 'STEM focused', our proven methods bring Science, Technology, Engineering, and Math to life, with top secret missions that foster curiousity, experimentation, & deductive reasoning.
  • TRUST OUR PLAYZ PROMISE - 100% Satisfaction Guarantee! You know the quality you will get when purchasing a Playz product. If you are unhappy with your purchase, contact us anytime for a refund.
New
PlayShifu - Plugo Detective without Gamepad - Kids Spy Kit
  • Plugo Detective by PlayShifu is an AR-powered, hands-on kit for young investigators. Find the clues and catch the culprits in thrilling story-based games with Gizmo Max.
  • STEM, STEAM & everything in between! Put screen time to good use. Enhance problem-solving, observation, and deduction skills while solving mysteries like a real detective. For ages 4–10.
  • Download the free Plugo app to unlock 3 interactive games and 100+ levels with increasing difficulty.
  • IN THE BOX: Plugo Detective comes with 1 Gizmo Max with slider base and lock, 4 special lenses and 6 clue cards.
  • COMPATIBLE DEVICES - iOS - iPad 5th gen or newer, all models of iPad Pro (except Pro 12.9"), all models of iPad Air, iPad Mini 2nd gen or newer, iPhone 6 or newer | Android - Samsung devices: 2015 and newer, 2GB RAM and above [Samsung Tab S7, S7 Plus, A 10.5 not supported] | Amazon Fire - 7 HD 2019, Fire 8 HD 2018 and 2020 [Fire 10 not supported]
SaleNew
Creative Escape Rooms Spy and Detective Kit for Secret Messages
  • Perfect for Detective, Spy, and Escape Room Themed Birthday Parties
  • A Bundle Deal for Escape Room Props
  • Create encrypted messages for friends and family to decode
  • The Pigpen Grid Key measures 4.3" x 3.8" x .25". The text is deeply laser engraved on alder mdf. The Super Secret Spy and Detective Cipher measures 4.4" in diameter, is about .75" in height and is made from baltic birch wood.
  • Every Creative Escape Rooms item is handmade in our Spring Hill FL shop
New
Tacobear Spy Kit for Kids Detective Costume Set Secret Agent Outfit Role Play Dress Up Costume Science Educational Toys for 5 6 7 8 9 10 11 12 Year Old Boys Girls
  • GREAT DETECTIVE ROLE-PLAY COSTUME SET: This detective role play kit features everything your child needs to look just like a detective including a black trench coat, hat, rearview mirrored sunglasses, gloves, crime scene tape, evidence cards, invisible ink pen, fingerprinting supplies, record book, and easy-to-follow instructions
  • DETECT AND COLLECT FINGERPRINTS: Kids can follow the step-by-step instructions to do several fingerprinting activities. They will look really cute running around with the trenchcoat and hat on, extracting and collecting fingerprints in their surroundings, just like a real detective!
  • FUN AND GOOD QUALITY: Novelty spy look behind sunglasses will allow children to see up what’s behind them. The ink pen writes totally invisibly until they use the light on the cap blacklight to see the secret message. High-quality fabric and construction for long-lasting use.
  • CREATIVITY & IMAGINATIVE PLAY: Our spy kit for kids encourage your child’s interest in STEM-based activities and to explore their surroundings, they can use this spy kit to create crime scenes, reveal hidden messages, collect and identify fingerprints, ask questions and solve certain mysteries.
  • GREAT ROLE-PLAYING GIFT: Great gift to keep your child occupied for hours! Perfect for school activities, holidays, spy-themed parties, birthday party or festivals (Children’s Day, Christmas, Halloween, Thanksgiving, New Year). Suitable for any child between the ages of 5 and 12 years old.
SaleNew
Princeplay Spy Science Kits for Kids - Detective Outfit Fingerprint Toys Educational Experiment Gifts Gadgets Gear Stuff for Teen Tweens Boys Girls Age 5 7 8 10 12 Year Old Fun Role Play Costumes
  • 【FUN AND PRETENDED PLAYING TOYS FOR LITTLE SPY】Little science spy kit for little kids with many cool gadgets for teen boys and girls with amazing hat, sunglasses and many more. Your kid to fall in love with the world of detectives with this fun STEM toy.
  • 【INCLUDES BABY POWDER WITH 2 CHARACTER COSTUMES】This spy kit comes with everything you need. Including a Black Hat, Magnifier, Stamp Pads, Clip, Tape, Film Card, Evidence Card, Police Tape, UV Pen, Sun Glasses, Blower, Brush, Tobacco Pipe, Cap, Eyewear, Baby Powder, Mission Cards and Instructions to guide you at every step.
  • 【5 MISSION CARDS MAKING A WONDERFUL DETECTIVE】The Spy Kit offers 5 different activity cards for children to engage in, so they can focus on this interactive toy instead of their computer screen. Hours of fun and imagination are guaranteed as there’s a lot to investigate! It will keep your kids inspired, engaged and entertained while teaching them the basics of critical thinking and encouraging them to experiment.
  • 【SAFE AND DURABLE MATERIAL FOR KIDS】Everything included in this kit is made of safe and durable material so that your child can have fun limitless without any fear. Detective Kit allows children to experiment, explore their environment and learn the techniques and tools detectives use to solve crimes, collect evidence and catch the bad guys.
  • 【30 DAYS GUARANTEE AND A PERFECT GIFT FOR KIDS】Buy with confidence with 30 days Money back guarantee. A perfect present and gift. It introduces children to science experiments to help them develop critical thinking and sharp focus. It encourages children to develop their imagination and creativity while roleplaying.
New
Professor PUZZLE The Detective Toolkit - Mystery Case - Sherlock Holmes Themed Detective kit for Cracking Cases and Solving Mysteries
  • The Baker Street Detective Club - The Detective Toolkit for cracking 10 exciting mysteries.
  • Hours of fun and excitement with solving mysteries on your own!
  • This kit has everything you need to crack cases, solve mysteries!
  • Set contains: Magnifying glass, pencil, 40- page notebook, 8 evidence tags, 15 spy challenges, chiper wheel, spy pen, fingerprint kit, 10 unsolved cases files & solutions
  • Part of Professor Puzzle’s Baker Street Detective collection - A collection of mystery quiz games & kits
New
BLOONSY Spy Kit for Kids Detective Fingerprint Toys for 6 7 8 9 10 11 12 Year Old Boys Girls Secret Agent Investigation Science Set
  • A KIT FOR YOUNG SPIES: Get your kid to fall in love with the world of spies and detectives with this fun STEM toy. The Young Detective Kit allows children to experiment, explore their environment and learn the techniques and tools detectives use to solve crimes, collect evidence and catch the bad guys.
  • THE PERFECT TOY FOR KIDS WHO ARE EAGER TO LEARN / CURIOUS KIDS: Our Spy Kit is designed for children who want to get to know the tools and methods that real-life spies use for solving mysteries. This STEM toy is a great spy training that teaches kids to record and match fingerprints, check the authenticity of money and much more spy stuff. No criminals will get past your young spy!
  • HOURS OF FUN, FOCUS AND IMAGINATION: The Spy Kit offers many different activities for children to engage in, so they can focus on this interactive toy instead of their computer screen. Hours of fun and imagination are guaranteed as there’s a lot to investigate! It will keep your kids inspired, engaged and entertained while teaching them the basics of critical thinking and encouraging them to experiment.
  • DEVELOPS IMAGINATION, CRITICAL THINKING AND CONCENTRATION: This detective kit for kids is child-friendly and comes with a simple-to-follow booklet explaining how to use the kids spy kit to get the ultimate experience. It’s easy to use and allows your children to develop their critical thinking skills, improve their focus and work on their imagination all while playing.
  • A DELUXE KIT FOR BEGINNER SPIES: If your kid wants to become a spy, this top-quality toy set has everything they need. The kit offers many experiments and activities, providing kids with hours of fun and learning. It introduces children to science experiments to help them develop critical thinking and sharp focus. It encourages children to develop their imagination and creativity while roleplaying.

Last update on 2022-05-17 / Affiliate links / Images from Amazon Product Advertising API