Nes, I completely understand your frustration. I opened my mouth this week to a "friend" with MG kids thinking she would understand my concern with DS flying through EPGY. She didn't. Now I feel uncomfortable, p.o.'ed . . .
May I recommend putting a water table in your kitchen, bathroom, basement . . . It'll be more fun than the toilet (hopefully) and always keep my DC and their friends busy. It may be an unorthodox inside toy (but you have an unorthodox kid) and it works as long as you can keep it on a surface that can handle getting wet. It'll get you through the winter. Plus it is always fun to bring snow into the water table for "experiments" . . .
P.S. With 5 cats, I'd avoid getting a sand table.
