Rack and Pinion Bot By Ruiz Brothers (Adafruit) · Example build · 8 views · 0 remixes A googly-eyed 3D-printed kinetic toy whose gear rolls around an oval rack, turning motor rotation into a bouncing back-and-forth motion 0SaveRemixCopy link Estimated parts cost 3 of 5 parts pricedDifficultyEasyParts5 parts · 5 pcs Start the assembly guide →