A Bug's Life

Oh, yes, as I understand it, hamsters do sometimes use a nesting-ball or a treadmill for its intended purpose -- until they go into Gnaw Mode (at which they seem to be much more /f/e/r/o/c/i/o/u/s/ effective than mice, gerbils, or even rats).

Mind you, I'm still of the opinion that it would be possible to hook up one or more small-animal/rodent treadmills to a miniature electric generator & storage batteries, in order to operate a computer -- though probably not in the Rube Goldbergish way that sticker depicts. (OTOH, it seems unlikely that they could generate enough electricity to produce enough light to grow crops adequate to supply all their dietary needs. That would put them in the same category as the small South American fish that subsist entirely on a diet of their own young (as per an old Fannish Mythos).)