Ball Bearing Pet Toy

A pet toy with a steel ball bearing inside. It makes noises, and rolls around in a neat way. The ball bearings I have are 11.11mm, but anything larger will work as well.

You don't press the bearing through, you drop it inside DURING the print. Carefully set however many bearings you like into the shell while it's at 50-70% completion. Remember that the hot-end is hot and that you don't want to place the bearing until it sits below the current layer (otherwise it might collide).

With a small magnet you can combine 2 or more toys so they spin around differently.