When one of my brothers was about three he was told he could be anything he wanted to when he grew up. He said he wanted to be a monkey.
I think my son takes after his uncle. Not 0nly does he regularly climb doorways and walls today he was getting his kicks by shimmying up the legs of the swing set in the park, hanging from the top bar and jumping down.
If I didn't know better I'd think he was part monkey.