My son is 16 months old and he can say many words but mostly by repeating me or my husband. He also likes to repeat them over and over again, like tickle-tickle and kiss-kiss or mama. He can sometimes identify pictures in his first words book but other times shakes his head no when I ask him what it is. He doesn't really point to show me something, mainly he points at words or letters in his book as I do with him. He loves his books, he just started bringing me his books when I ask him if he wants mama to read the book. He will pick up certain books by name when I ask for them. He has good eye contact but sometimes ignores me. One thing he cant do is clap. Its like he physically cant get his 2 hands together properly. I sing him this song where you put your pointer finger pointing down on your palm and he does this sideways. I dont really do the pattycake thing but when I have and ask him to do it, he will do the pointing to his palm sideways. He doesnt have anyone else to play with but me and dad, but once when we were over grandparents house he pretty much ignored them and chose to step on the new tiles on they had laid out on their kitchen, he would get up on the new tiles then back down on the old ones. I had to really work to distract him from this, so I started singing row, row , row, your boat. He started to sing roh roh roh as he continued doing the same thing. Like I said he can say many words by repeating them but doesn't really use them. For a while I would ask where daddy was and he would say "outside", because I always say to tell daddy to take you outside when my husband gets home from work. He also likes to spin around in circles, not for a long time maybe like a minute, then goes on to playing. How do I know whats normal or not?