Campbell is learning things from his sisters that I'm not sure I'm ready for him to learn just yet. Ella was at least two before she started doing headstands on the sofa. He's only 21 months. He can also do somersaults across my bed without a problem. Well, almost without a problem - the other day he somersaulted himself off the end of the bed and landed on the floor on his bottom. Fortunately, he was more scared than hurt.