This is my first thing.

A new wheel to replace one that broke on a toy stroller. The stroller was only worth $6 and is already held together by bamboo and gaffer tape so not really worth repairing but I did it anyway and my daughter loves it!

If you want to recreate this wheel first print off the test part. Small holes print smaller than they are supposed to. I printed half a dozen different sizes before I got a hole that was just right to force fit onto the axle. When you have a size that works edit the openscad wheel and change the variable at the top.