Just wondered if anyone else has experience of a tall child. ds2 is just 5 and 122cms which makes him about the height of a 7yr old. In fact he's the same size as ds1 and people often think they're twins. Should I be worried? He's always been tall but people keep saying it will even out - not yet! I wondered about Marfan syndrome but he is in proportion. Also, he's had behavioural problems which makes me wonder if all is well. Esp as not much height in family (only a tall uncle).