So we bought Melvin a ball to play in. He loves it. Problem is, so does Cooper. Cooper likes to push it around with his nose, which makes it go a bit faster than Melvin's little legs will carry him, so Cooper has gotten banned to the basement a few times.
Problem with the ball is, Melvin can now move. Macy had him in her room, and then went to the bathroom for a bit, came back and couldn't find him. She's freaking out, we all come upstairs, are looking all over the place and can't find him anywhere. I look over the railing and he has managed to go down ALL the stairs (14 of them!) and is now in our living room. (*** Note to Macy... we live in a 3-story house and I don't think that hamsters like going down all the stairs in their ball.) He seems fine, but it was a good lesson learned.