Hi, i have two small children and next have 3 teenage boys! i rent my property so need to do this as cheap as possible. The kids room joins obviously to 1 of the boys rooms and i need to block the sound. I can hear normal talking, the tv but worst is the Xbox when he has his headset on. If i ask they do curb the noise but it is also unfair that he has to be so quiet! How can i sound proof the joining wall cheaply and quickly so we are all happy?? Not egg boxes though!!! i dont like the effect ha ha!!