This includes the following kits:

• Mini Round Robot Chassis Kit - 2WD with DC Motors (https://www.adafruit.com/product/3216):

This chassis kit provides you everything you need to build the two-wheeled robot vehicle. The chassis can be built by combining metal plates with standoffs. The kit includes the following things:

• • 2 x drive motors (drive with 3-6 VDC, 200-400 mA run, 1.5 A hard stall)
  • 2 x wheels
  • 1 x plastic caster ball
  • Anodized aluminum frame and all mounting hardware for assembly
• Mini 3-Layer Round Robot Chassis Kit - 2WD with DC Motors (https://www.adafruit.com/product/3244):

This is the extended version of the mini round robot chassis kit and provides more vertical space to hold your electronics and battery compartments. This kit includes:

• • 2 x drive motors (drive with 3-6VDC, 200-400 mA run, 1.5A hard stall)
  • 2 x wheels
  • 1 x plastic caster ball
  • Anodized aluminum frames and all mounting hardware for assembly
• Mini Robot Rover Chassis Kit - 2WD with DC Motors (https://www.adafruit.com/product/2939):

The mini robot rover chassis kit provides you everything you need to build a two-wheel-drive robot rover. The chassis can be vertically expanded by adding more metal plates (https://www.adafruit.com/product/2944). This kit includes the following things:

• • 2 x wheels
  • 2 x DC motors in micro servo shape
  • 1 x support wheel
  • 1 x metal chassis
  • 1 x top metal plate with mounting hardware