I just wanted to add that I feel for you. If someone doesn't live with a child with obsessive interests, she has no idea how mind numbing it can be for the parent. My DD5 goes through various "obsessions" that everyone thinks are harmless and her recent evaluation came back as negative for Aspergers, but that doesn't make it easier on me as a parent. I worry it will alienate other children, that her brain gets stuck in ruts, etc. I feel for you even though it appears harmless. It can be draining to hear about the same topic again and again. I know.
