BB-8 inside gyro

use this insde of one of the spero sized BB-8 models available here on thingiverse. To use the part you will need a magnet to atach to the top and whatever you can find to add weight inside then some hot glue to hold the weight and the magnet in place. add another roound magnet inside bb8's head and he will be able to roll around on the floor while keeping his head in place