I've had that lots. What I find works well with me. Is that they are being loud to probe us to say something to get attention. So I sit in a corner on the other side of the rm and every time they make a noise or say something. I say shush very loud and short sound. They'll shush but then be loud and I'll say shush again! If they stand up I say firmly....down. I only ever use those two words and never look them in the eye. Lol. Works well for my group. Now if I hear them. I just yell from downstairs shush, down. And they listen. But don't make it gentle like shhhh for a baby. Make it kind of harsh, short sounded. SHUSH. LOL. And if they r over two they get a time out after nap before snack.