Suggest Treatment For Hyperactivity In A Child

my 3.5 yr old kid who is hyperactive at home( keeps talking 24 hrs, consoles other kids at home, doesn t sleep at all) behaves entirely different outside.(doesn t play with other kids outside, doen t answer any question that others ask her). Teachers at her school complain that it is very difficult to get a word /ryhme from her(but she sings all the rhymes at home). last week, I took her with to a new school for admission.There they took all the kids to an activity room and asked them to play.my kid is the only one who didn t go with them and no one there could make her move from her place.At last when I accompanied her till the room and left her, she started crying and ran from there. What could be the reason? Eagerly waiting for the reply.