These print in place bearings take 23 minutes and can be printed to understand the engineering and how ball bearings work or they can be printed for a fidget toy! https://youtube.com/shorts/-sOsR-bVKwU?si=yNJgMYLl0p9agQ27 https://youtu.be/_4YW_2NRJW8?si=ZeiI7Y1VOloz17Sz https://youtu.be/XyX0R2AW-aY?si=rtg78qviabvBG7mF https://youtube.com/shorts/1HCrpLnZFOc?si=wYPZm-xbA4v6c3-s