Yet another spinner

I believed I would not have to do this kind of things, but since this fashion invaded the schoolyards here, kids just didn't let me any choice :)

They wanted something roundish, comparable to what their friends buy in stores (yes, they are selling them in stores now !). So to avoid to use too much bearing on it, I used instead M8 bolts. bolt caps are provided to be screwed inside using your thumb, as well as central caps. Then only one central 608 bearing is required.

3 version, using 4, 5