I have a 11 month old son he has learned how to scream and he screams all the time. In the store at home in the car and it's driving me crazy. It's not a little cute scream it's yelling on the top of his lungs screaming. I don't know what to do.. how do I get him to stop? We have told him no all the time and he just keeps going. Any tips on how I can get him to stop? Please help.