Hiya im a bit concered about my son's speech but maybe in over reacting, he doesn't say mum at all, the words he can say are "ta" most common he uses this for everything he wants in wonderig if that's why he's not learning new words, he can say banana, he can say gone, tickle, sometimes cat, he used to be able to say teddy bear but he won't say it now, does this sound normal? How can i encourage new words? Im trying to teach him but he is so disinterested in what im doing and pays no attention