You want to make sure that there is a potty seat and step stool in every bathroom of the house. The more accessible the potty is for them and the more independent that they feel, when they have to go to the potty, the better it is for them. They need to be able to access the toilet with freedom and ease. The plastic step stool will give them the boost that they need to reach the height of the adult toilet without any problem. Then they can move it over to the sink and wash their hands.