If you'd like to give your hand the freedom to wander, these next steps will show you how to add a simple axle and ratchet mechanism to the hand.
You may find your hand moves better on certain surfaces, depending on how slippery they are.
If you'd like to give your hand more grip, adding a thin layer of glue to the wheels and a dab of glue to the tips of the fingers helps.
The battery that powers this hand should last a long while. If you need to recharge it, look at this guide to learn how to do it safely, and all about how LiPoly batteries work!