A small box that is placed on your bathroom door (normally used my Marykate)when you press the button on it it screams loud as hell in your ear and if you cant hear it, you cant go to the potty because you have a major risk of falling in with your doods and getting flushed!
"Marykate, dont forget to use the scream box. What mom?"
"Marykate presses the button. AHHHHHHHHHH!!!! hmmm I dont hear anything? 5min later MOM I FELL INTO MY MASSIVE SCUMY LOAD HELP HELP!!!!"
-Matt and Frank "deafyyy"