Ds by the age of 4 was fascinated by, in turn, dinosaurs, the human body, egypt, pirates, Rome. He knew enormous amounts of information about the above, poured over books for ages and would correct adults who got things wrong. He also has aspergers.
Dd is now 4 and is interested in errrm princesses and moshi monsters but hasn't got any detailed knowledge about either. She is bright, has a wide vocabulary and is very sociable and is definitely interested in life in general but is no where close to ds in terms of depth of knowledge or interest in any given subject.
My question is really: is this a boy/girl difference or a 1st/2nd child difference or an aspergers/NT difference?