And does it ever work! If you ever decide to sleep in our apartment, be prepared for this little guy to be running ALLLLLLL night. Yes. Turns out they weren't kidding that hamsters are fairly nocturnal!
Construction time: 1 hr
Construction cost: a small amount of a $1 wooden dowel. ~$0.05
*Disclaimer: This video makes it seem like this wheel is really loud. It isn't.*