The first 8BitRobots robot is a robot ball. The picture below shows the exploded design.

The ball is constructed from several 3d printed parts and a few other bits:

• 3D Printed:
  • 2 Hemispheres which form the ball case as well as acting as the wheels.
  • The main frame to which all the other pieces are attached.
  • Battery clip, which holds the battery holder.
  • The 8BitRobots standard module enclosure.

• Extras:
  • Two micro, continuous rotation servos to drive the wheels.
  • Two M2 bolts to hold the wheels on.
  • Some wire and a switch to wire the batteries to the module.
  • 6 AA battery holder.
  • A few zip ties to hold the pieces together.