DD is in Y2. She gets very interested in completely random things for a while and then move on to something else e.g. dinosaurs, Tudors, butterflies, cyclones (from watching Wizard of Oz).
It tends to be her main topic of conversation. She wants to play games involving her interests and constantly asks questions about it.
Today her teacher told me DD was obsessed with cyclones. He indicated that this was a problem and I should be worried. At night time she told me she was sad as her teacher banned her from talking about cyclones.
Is this normal 7 year old behaviour or should I be worried?