There is a question [How do astronauts turn in space?](https://space.stackexchange.com/questions/2954/how-do-astronauts-turn-in-space), and related questions here and on physics.stackexchange, that detail how astronauts might maneuver by spinning their upper and lower body separately. Wouldn't it be easier to spin a fidget spinner, and to preserve angular momentum, spin your body in the opposite direction?