Interchangeable Arm Penny Fidget Spinner

thingiverse

I wanted to make a spinner that had interchangeable arms. So I did. You can have a different body and arm color. The idea was that if you made them for kids, they could trade and upgrade the arms with new ones and have whatever color scheme they like. Use pennies for the weights. Tip: Use a gram scale or a balance for your sets of pennies to make sure they are very close to the same weight in each arm to get proper balance. Or only use all pennies from the same year or something. The metal composition has changes many times over the years, so they have a pretty large variance in weight.