Please, do not give in to sexual discrimination. It is absolutely ok, for a boy of any age to play with dolls. It is also the same for girls to play with dolls. How can you tell your children it is okay for one sex, but not the other? Doing this reinforces societies gender inequalities. And, really, dolls are made for boys. The difference is that they are called "action figures." Children should be allowed to explore their interests. By telling them "no", they are being held back and restricting their imagination. Let kids play. It's harmless.