relieve itching ball

The following content is the source of ideasdesigner：Koh Bei NingDesign school：National University of Singaporehttps://designawards.core77.com/health-wellness/121718/Rollo-Rollerball-Itch-Relief-Devi I'm just a clumsy modeler. I saw that many people were bothered by itching and wanted to get the model files of this project, so I built this model during my fishing time at work. I didn’t use the same shape, density and height of “teeth” as the designer, mainly because I was about to get off work and didn’t have time to study how to uniformly form a spherical array (actually I was lazy) Use consumables as the stakes to connect the two hemispheres. The size of the hole has been appropriately enlarged. If the hole is too small, you need to use a pen knife to enlarge the hole. If it is too large, use an appropriate amount of glue. The fixing method of the original designed ball has been changed, and a central axis has been added to reduce rotational friction and drag.