My 13 month old son loves spinning wheels - on his toy cars, stroller anything. He is also fascinated with lights. He cannot wave or point but loves peekaboo and clapping his hands. He isn't at walking stage yet, but climbes and cruises furniture with ease. He is quite social and will "look" when asked where is the dog, sister, daddy or mummy and on the whole is quite social and boisterous. My 4 year old daughter was diagnosed on the spectrum at 22 months old. Could my son also be on the spectrum?