Amazedmom, take the online checklists with a grain of salt; no substitute for expert evaluation.

Imaginative play: this issue too requires expert teasing out. It is a mistake to think that people with AS have no imaginative play at all. Some kids with AS actually have elaborate fantasy worlds and imaginative play. The difference between these and typical kids is usually that the play is heavily scripted and inflexible (others can't participate unless they are "doing it right")-- or highly repetitive, or both. See Sohn and Grayson's book on the "fantasy boy" type of AS.

DeeDee