jenn those meters can be set to any bicycle wheel size. And so if you keep a big wheelsize and you use the small thredmillsize, you can get a hamster to read the meter even over a hundred miles if you want.
My daughter has a Robo Hamster (Roborovski). He does the same thing. They are very gentle and rarely bite like larger hamsters, but you can't let go of them or their gone!!
It's best to keep them in a plastic ball, if you want to play with them.
http://www.youtube.com/watch?v=YXRH50fvHWA
It's best to keep them in a plastic ball, if you want to play with them.