I don't know, but this could be a sign of Autism as well. If you are concerned, then talk to the parents, and if they become concerned, then have them talk to the pediatrition. He may be too young to diagnose anything, but if it is brought to the ped.'s attention, he will help keep an eye on it, and when he gets a little older, will help test him for any thing. Keep an eye on it and talk to the dr. it can be normal, but you never know!