Tom, if you’re not around and the kid is inside the dryer, he can’t turn it on by himself, and most dryer doors – like refrigerator door – will pop open. He’ll be in the dark for a bit, yell, and somebody will rescue him. I dont think Mom would leave him completely alone and go to the store. She’ll be in the kitchen, or someplace close by. Actually, looking at the door, I’m not even sure he could close it from inside.