Clear Ball Hamster Ball Small Pet Running Exercise Ball Guinea Pig Playing Ball

Not sure for what pet this thing would be good; it's quite small. Barely the size of a softball, if that. That said, it's pretty simple: a clear plastic ball, hollow; you snap the two sides together, and off you go. It doesn't too terribly cozy for an animal, and like I said, it's small, so I wouldn't hardly recommend it unless you have a pet mouse. We got it for a craft project, and it worked fine for that. About as durable as you'd expect; won't crack terribly easy, but won't stand up to a tank, either. Maybe as tough as most plastic food packaging, like a soda bottle.