All of the MINDS-i kits are interfaceable with standard hobby servos, motors, and wheels with 12mm or 14mm hex hubs. You can even use Screw Adapters to interface with pieces you build yourself! This is a really fantastic, versatile kit, and it is made right here in the USA!
This Motor Gearbox Kit integrates into all MINDS-i building systems, and is compatible with most Hobby standard DC Motors, Spur & Pinion Gears, and Batteries.
- Includes Motor Box (2 halves), Driveshaft (1), Bearings (2), Battery Mounts (2), and all the necessary hardware
- Dimensions: 2.8"(71mm) x 3"(76mm) x 1.2"(30mm)
- Works with the Drive Line Pack.
$22.00 
MINDS-i Rack And Pinion Kit
MINDS-i Drive Line Pack
MINDS-i 500 Piece Basic Construction Set