This mechanics kit by 4M features a fun project where you get to assemble your own Brush Robot. Each set includes a battery case with wires, wooden brush, paint brush, googly eyes, motor, a set of plastic mechanical parts and instructions. Assemble this robotic brush and let it clean up after you. Requires two AAA batteries (not included). For ages over 8.
Toysmith TS4574 Brush Robot - B01M1NJPVB