My baby is 1.5 year old and she speaks like 20 words, we kept count, is this low for her age , how can we improve the word count, we try speaking with her and we also point things and make her say, she says them for some words but most of the time, she just looks at us and does not repeat, how can we make her repeat what we say, she points at things when we ask her where is the stuff but does not repeat, how can we make her speak more and improve her vocabulary, please help we are worried