My DT boy is almost 3 and he is such a follower. His twin sister is the ultimate madam and takes the lead in everything. He spends all his time either copying her or wondering what she's doing, where her toys are, where she is and so on. She never gives his whereabouts a second thought, but forges ahead, brushing aside all obstacles, usually yelling or singing. Should i be concerned about this? Will he grow out of it? How can i encourage him to be his own person?