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Thames & Kosmos Robotics Smart Machines Junior STEM Kit, Build & Code Your Robot’s Movements, Speed, Lights & Sounds, for Ages 8+, Use Screen-Free w/Built-in Buttons or via Block-Based Coding App

  • Based on 91 reviews
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Availability: In Stock.
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Arrives Monday, Jun 15
Order within 1 hour and 33 minutes
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Features

  • Introductory build-and-code kit for beginners and entry-level programmers ages 8 and up; build your own cool, 9-inch tall robotic pal!
  • No complex coding skills required! Easy, block-based coding app programs up to 200 different actions.
  • Two ways to play: For screen-free play, control your robot using the built-in buttons, or download the free app (Android or iOS) to your smart device to program your robot's movements and sounds.
  • Exercises essential cognitive skills including problem-solving, critical thinking, and data-driven decision making.
  • Part of Thames & Kosmos' award-winning Robotics: Smart Machines series, which is recognized for its high quality and functionality, robust educational content, and stellar play value.

Description

Build and program your own robotic pal with this simple, fun, and customizable introduction to robotics. Assemble the durable, plastic building pieces into a 9-inch tall bot, then pair it with the free app on your smart device to unlock all of Junior’s capabilities. You control Junior’s movements and sounds! Program its movements directly on a built-in keypad or use the easy, visual interface on the app. Drive it around by remote control or use your device as a gyroscope. Play a make-believe robot workshop game in the app to diagnose any onboard issues. Junior’s microcontroller (or “brain”) has separate inputs for the LED lights that light up its eyes, a speaker, two motors (left and right), and a battery. A full-color, 32-page step-by-step illustrated manual explains how Junior’s functions relate to each of these elements, walks kids through the construction process, and helps them make the most of the app’s features – all while teaching them about robotics in the real world. The app requires a tablet (recommended) or smartphone running iOS or Android. Please check the app stores for compatibility and device requirements.

Brand Name: Thames & Kosmos


Age Range Description: Kid


Manufacturer Maximum Age (MONTHS): 120


Manufacturer Minimum Age (MONTHS): 96.0


Global Trade Identification Number: 70


Set Name: Junior


Manufacturer: Thames & Kosmos


UPC: 814743018570


Manufacturer Part Number: 620399


Model Number: 620399


Unit Count: 1.0 Count


Included Components: 2 LEDs, 2 motors, Plastic building pieces, Speaker


Item Type Name: Robotics STEM Kit


Number of Players: 1


Educational Objective: Coding Skills, Critical Thinking, Problem Solving Skills, Programming Skills, STEM


Power Source: Battery


Operation Mode: Manual/Automatic


Indoor Outdoor Usage: Indoor


Is Assembly Required: Yes


Theme: Robotics


Color: White and Blue


Size: 13.8 x 14.5 x 12.2 inches


Item Weight: 1.15 Kilograms


Item Dimensions: 13.8 x 5.9 x 11.5 inches


Material Type: Plastic


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Monday, Jun 15

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


  • Cool Robot
This is a really well made robot and not hard for a 9yr old to build alone. The instructions to build are easy to follow. The first words of my daughter after turning it on and seeing it work were “wow this is cool, really cool”, I agree with her and it seems that the app has some good features as well. The kit contents are very well organized with lots of extra screws. ... show more
Reviewed in the United States on March 1, 2026 by Happy Mom

  • Highly recommend!
This was a great gift for our 10 year old! He enjoyed building it along with playing in the app to code and create for his robotic machine. Hours and hours of fun! Highly recommend!
Reviewed in the United States on December 26, 2025 by Brad

  • Great gift. Definitely get it.
My 10 year old put this together himself in about 6-7 hours. He loves it. Definitely a great product.
Reviewed in the United States on November 13, 2025 by Amazon Customer

  • Never got this to work
My 8-year-old-grandson was very excited to get this for his birthday, and we spent quite a bit of time carefully assembling this (there are a LOT of pieces - there is NO way he could have assembled it himself). We followed the instructions carefully, and we were quite pleased when we finished the assembly, only to find it was inoperable. I tried taking the parts back apart and reassembling step-by-step and checking the contacts as well as the batteries - no luck. We were both pretty disappointed. ... show more
Reviewed in the United States on May 24, 2025 by Greg A. Marshall

  • Bummer, maybe
UPDATE: Customer Support got back to me and are sending a new part. I have hope! The screws are tiny, and the pieces don't always fit together very well. I myself assembled it twice, and it still doesn't work. Reached out to customer support on Thames & Kosmos website, and have yet to hear back. Disappointing for sure. ... show more
Reviewed in the United States on January 6, 2026 by Amy

  • Great first programmable robot
An easy first robot/programming experience. Built it with a group of children ages 7 to 14. Instructions clear, app clear and worked right away. Took about 3 hours total over 2 days from opening the box to having it move. Very worth the price.
Reviewed in the United States on May 24, 2025 by Jean

  • Fun robot for younger kids!
I received this robot kit several weeks after ordering only to discover that half of the pieces were missing. My son was so disappointed. I ended up purchasing at a local retailer however, and it’s a great toy. Fun to build and fun to program!
Reviewed in the United States on February 6, 2025 by Momna54

  • Fun for 7 year old.
My 7 year old grandson loved this! He was so excited and wanted to put it together as soon as he opened it. He and his dad assembled it and he played with it for hours. Good purchase.
Reviewed in the United States on February 25, 2025 by Mike K.

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