Roller Mouse Cat Toy

The cats love to play with pistachio shells, so was looking to make something that created the same sound, but had a bit more inertia to keep them entertained. The ball in the middle (printed it at a much higher infill) keeps the toy moving along, and takes it off into different directions as well.  Printed with some paint-on supports to keep the ball in place, but no other supports. 

The design is pretty big, but I scaled it down nicely.