I agree with you he is doing it to get attention and maybe he has copied it from another child, you may have to put up with some of it, but try distraction, when he starts to scream , give him something to do get him focused on another game, and make sure he is getting lots of positive attention and you talk to him, all children like talk and noise, if he isnt stimulated enough he will make his own, if you are a quiet Mom get a little noisier, how about some lively music and singing it could replace the screaming.