We got gerbils for the prince's birthday a few weeks ago. They are pretty stinkin' cute. Lately most evenings Himself loads them into a cookie jar and transports them from their tank to a popup playpen in the living room, where they have more room to run around and human interaction is more possible. The littlest one can hop up to the top of the playpen wall in the blink of an eye, and if you're there he can run right into your hands and hang out getting petted for a couple of minutes before you put him back down. (His medium-sized brother doesn't like being picked up, and the biggest one hasn't quite worked out climbing the walls yet; he'd rather chew on a cardboard egg carton.)