hi my baby boy is three years five months active boy. he is very much active boy and likes to run play dance jumping etc. he becomes excited sometimes by seeing neighbours or friends and mostly he plays with other children. everything seems to be very normal. but from last few days I observed he is doing finger movements and from two three days it is more. so I m worried about that. please suggest anyone if it is related to autism or any other problem??? second thing is he understands things and talk to us but if I ask daily life like what you did today or what happened outside he is not interested to give answer always n even not at all properly. if I force him to remember and say he avoid me by doing anything else. is this behaviour is a normal one or he really can't remember things?? but he says things or about people what already happened at one particular place or time.. so please suggest if everything is normal or not?? he knows what he needs and ask our help too. but sometimes I feel like the problem. please suggest