My oldest son wanted me to print him a fidget spinner because other kids on the bus had them. I remembered that I had some bearings from some rollerblade wheels that I had never replaced. So I got them out and printed some spinners. The middle son wanted a Batman spinner, and they both wanted to use glow in the dark plastic. The bearings aren’t the best, but they work. I used a hair dryer to heat up the plastic to make the bearings fit. Unfortunately, that made the plastic (PLA) soft. The part stretched and I ended up super glueing the bearings in place. They are pretty fun to “play”with.
