I've got one that climbs. It was hilarious when he was little and learning how to control his body. I had the crappy analog therm/hygro that comes with the tank kits and sticks on the side (I've gone to digital now) and he would climb onto it and hang, but it took him forever to learn how to balance his coils so he wasn't too heavy on one side and he'd slowly start sliding off and then fall upside down, look around like he was confused, and do it again. Now he's fat (joke--not actually fat) and just sticks his nose into everything.