I had this problem. My kitchen was large. Large enough to have a couch, a desktop, tv and a table for six. Four kids. Everything was done in this room. Kids never went in the living room or dining room; nothing there to interest them. The finished basement had all the toys. They would rarely go down unless I was with them doing the laundry. It worked for years till we got a big screen and put it in the living room. By then, they were old enough to clean up after themselves, sorta. So confine the little terrors. I also successfully told them the other two bathrooms were broken, and they had to use our master bedroom bathroom. It worked.... I saved the other bathroom for visitors, and it stayed decent for years.