I am well aware that fidget spinners were so 2017, yet here I am making another one for all to satisfy their addiction. It's very similar to the previous one I made not too long ago (check it out!). It uses 1.5 cm ball bearings to increase angular momentum and will use a 608 bearing. Everything snaps in so using a somewhat flexible filament such as PETG is optimal. If yours breaks when you snap the ball bearings in, up the infill or change to a stronger filament. Happy spinning!