This thing looks equally challenging and fun to build! There’s a video below showing it in action, and you can grab all the files and parts list here at Rob Ives’s project page. (Update: a ZIP of the files is available; add the free ‘product’ to your cart and proceed to checkout, and you will receive a download link.)
And a hat-tip is due to Just Add Sharks for sharing this wonderful gem of a project (and the animated GIF!).
Make a robot friend with Adafruit’s CRICKIT – A Creative Robotics & Interactive Construction Kit. It’s an add-on to our popular Circuit Playground Express, FEATHER and other platforms to make and program robots with CircuitPython, MakeCode, and Arduino. Start controlling motors, servos, solenoids. You also get signal pins, capacitive touch sensors, a NeoPixel driver and amplified speaker output. It complements & extends your boards so you can still use all the goodies on the microcontroller, now you have a robotics playground as well.