ただ回すだけじゃだめらしいんですけどねー。
ちなみに、ホントはこんなことしてませんよ？(笑)
壊れるからやっちゃだめです。

Apparently, you shouldn't spin them just to spin them, though.

Incidentally, I didn't really do this, okay? :-) You shouldn't, because they'll break.