4.5 Fun, but the doors the doors! Daddage | 19/06/2010 | See all Daddage's reviews (44) The Car Add on for Zhu Zhu (Go Go) pets is fun, and funny.You need to clip the garage together, which is easy, but it can un-clip all too easily, meaning you have to fiddle to get the doors back in again. A minor niggle. I just wish, once clipped together it stayed clipped! Tempted to tape the thing down.Better than real hamsters though - they don't drive cars :)As with all these add-ons the hamsters get a different "code" from a series of ridges in the floor as they run into the garage, which means new noises from the little blighters.Clever.