My ds is 3yrs 3 months, has an older sister who is very talkative, and he tend to be monosylabic with his speech...or gabbles alot. He can and does run to full sentences but not often, only when he really needs to. He is fine with his comprehension, and can hear well. I've read posts here before about how to help kids along. I'm trying to read more with him, and repeating basic sentances to him, running commentery type stuff. Anyone got any tips as to what's useful?