This is what my 2 1/2 yr old does in his spare time. I think he will be climbing Mt Everest by the time he is 6. Mind you this shelf is built into his wall of his bedroom and it is about 12 feet tall!! He is a nut!! I'm going to start a "What Russ is doing now" thread to so we all can get a good laugh now and then, cause he'll make you laugh!! (if I dont laugh, I'll cry and then I'll kill em!!! )