I have a son who turns 2 on april the 13th. I dont know if its normal or not but he can not say many words. All he can say is, Mum, Dad and TaTa. Sometimes he tries to say car but he cant make the sound of the c part of the word. He understands ALOT and is quite brainy and was very advanced at doing things e.g crawling, standing, getting teeth, but he just cant seem to talk. I dont know if its lazyness or im not teaching him how to talk right. So is this common? or would he need some extra help?