Zhu Zhu hamsters have taken over my home! My youngest son really, really wants a pet hamster. He is five and I know that a teeny tiny little squirming body is not going to be a safe choice for a rambunctious child. We compromised (meaning Mommy decided) on Zhu Zhu hamsters. Oh my goodness. Best decision ever. These little hamsters chirp, make sound effects and most importantly, they move around. This is a starter kit. It comes with a little round "room" and a couple areas to attach more sets as the collection grows. It includes the cutest little brown hamster. My son renamed it Squirrel and takes it everywhere with him. He even tries to sneak it into his backpack to go to school with him. The best part of Zhu Zhu hamsters is that each hamster makes its own unique sound effects. Each hamster works on the other sets and all you have to do is push the nose and it zooms off. They do not turn off and that is very annoying. It will be completely silent in the house and at two in the morning it will start chirping. Even though I know it does that, it still startles me when it starts making noise.
All in all, these hamsters aren't that expensive, but the batteries do need to be replaced every month or so. If it had an off button, I would have given it a complete five stars.