Sadly, there was no where for him to put it. We haven't started cleaning anything at all. There just seems to be no point in cleaning until right before Pesach. I see it like this - I can clean and then spend the next two weeks yelling at people when they so much as sneeze outside the kitchen or I can wait till the last minute and then clean quickly and hopefully, efficiently and most importantly, alone. I go through this internal debate every year and every year I choose the quick and last minute route. I don't like all the yelling.
Back to my son's little sign. Eventually he just hung it on the snack cabinet in the kitchen. Now the sign just sits there all day, mocking me every time I go into the kitchen.
It's okay though, I can take the pressure.