A hamster ball is the well-known plastic sphere the rodent can run in and exercise on the loose without getting lost in the house – or eaten by the house cat. I once saw a hamster who knew that in the safety of the ball he could chase the cat. It unnerved the cat. Way to go, hamster.
Yesterday in the playground at Roberts Elementary school they were having a festival with fun and games including a people-sized hamster ball: a huge, transparent, honeycombed sphere rolling around with a kid scrambling along on the inside, and a grown-up walking along being a spotter on the outside.
There’s a way cute video of such fun on YouTube.