My son is 3 and is lying about so many little things. For example, my Mom asked him how school was and he told her that he didn't go and I left him home alone while I went to class. Or he is doing something bad in his room and I ask him what he is doing and he says, "nothing". He will have something in his hand he is not supposed to and when I call him on it, he puts it behind his back and says he doesn't have anything. Or I ask him if he cleaned his room and he says "yes" but when I say ok i'm going to look, he screams no don't look. Because he didn't clean up the mess. It really pisses me off But he will tell the truth on so many other things that would be more than little, almost white lies, I DON'T understand. Oh, other than that and not being able to take no for an answer, he really is great!