Ok, now that I found some great toy ideas for my rabbits, I was wondering what kind of toys I could use for my rats. They seem to be a little shy when they're out of the cage. I have 3 boys, they are very friendly when you walk past the cage and they will all come up to the top to say hello. When they're out of the cage they're a little shy and seem to have no interest in doing anything but running around. Any ideas?