When the child points to his cup/a car/ball and grunts say " say cup" or what ever it is you want him to say and don't give it to him till he does .... If he just stares blankly repeat it again then walk away if he wants it bad enough he will use his words but if grunting gets him what he wants then what's the incentive. I had a dcb that was over two before he spoke anything other then mom dad uhoh. this child's parents also did all the talking for him ... For instance if we were outside and he pointed to a plane his mom would say oh plane .... Instead of saying "what is that"? Which would have allowed him to think and use his words .... He was just lazy and grunting worked perfectly!