Thumby, the Tiny Playable Keychain made by TinyCircuits

Thumby™ is an itty-bitty game system at the tips of your thumbs, a best friend for your keys, and an easy learning tool all-in-one. Start playing right away with preloaded games, download more games from our website and learn to program your own using our Web Browser IDE!

Thumby was funded by 4,502 Kickstarter backers in 2021, reaching more than 13 times its funding goal. 

Pre-order Thumby now on Indiegogo!

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Thumby Tech Specs

  • Processor: Raspberry Pi RP2040 Processor
  • Memory: 2MB total storage
  • Connectivity: micro USB for programming & multiplayer using Thumby Link cable
  • Outputs: 72x40 Monochrome OLED, Piezo Speaker
  • Inputs: 6 tactile buttons (4-way D-pad, 2 action buttons)
  • Power: Power switch, 40mAh Rechargeable LiPo Battery, ~2 hours of gameplay
  • Dimensions: 1.2" X 0.7" X 0.3" (29.5mm x 18mm x 8.5mm) - Sturdy polycarbonate plastic case with a built-in rechargeable battery and buzzer
  • Programming: MicroPython using the Thumby Web Browser IDE or Arduino IDE - create your own games! 
  • Multiplayer support via Thumby Link cable

Thumby in the Media



"Bzzz, Bzzz, Bzzz" - Fred, the Carpenter Bee at The University of Akron Blackledge Lab

About Us

We are TinyCircuits and we specialize in making small electronics for makers and hobbyists. 

We house our own manufacturing operation in Akron, OH, where we assemble, test, and ship all of our products. 

TinyCircuits is a supporter of open-source hardware and software and believes collaboration leads to faster innovation. Our products are all open-source and released under the Creative Commons Share-Alike 3.0 License. We are a proud supporter of the Open Source Hardware Association and have helped sponsor the Open Hardware Summit since 2013.

Our mission is to make cool stuff!