Cameron loves to be upside down, and has so since I can remember. Mostly, he does this on the couch, or with me when I'm on the floor with him. He'll go upside down at school, while we're waiting for Ethan, on the couch, in my lap...whenever.
Ethan likes it too, but not as much as Cameron, and it's not "in" him like it is for Cameron.
Here's a sneak peak at my acrobat. He just did this headstand for the first time against a wall. Usually it's on the floor and then up over the seats of the couch, or head on the seat of the couch and legs over the back of the couch