DS is 17 months and can only say Mama, Dada, Nana, Bye Bye and Dog. He babbles no stop and when i tell him to 'bring me a book' he will bring me a book, he knows what things are just will not say anything. We have been reading the same book since he was 6 months old every night in his bath - i say reading, its a picture bath book - and he still can not say anything from the book. He can point to a few of them like duck and frog but he cant say them he doesnt even attempt to. He doesnt attempt to say new words at all. Should i be worried? How can i get him talking? We read, i talk to him loads, pretend play, make dens etc, when ever we are out walking i will point to things and try to get him to talk but he wont. So how many words can your 18 month old say??