Hand Spinner

My math students often have trouble focusing in study hall. One of the students came to class with a fidget/hand_spinner. As someone with ADHD, I find twirling a pen or tapping my foot a much better alternative to opioids or focus enhancing drugs. I thought that having my students design their own spinner would be a great exercise in learning geometric construction through 123D Design, Autocad's basic 3D modeling software, and (hopefully) enhance focus in the classroom. Here is my take on the tr