One of the biggest obstacles to potty training, after your child gains muscle control, is their ability to reach the toilet. There are many small toddler size training potties available, but eventually, your little guy or girl will need to start using the big toilet. This is why you need a quality step stool. The right step stool can sit at the base of your toilet and allow your child to be at the proper height to sit or stand comfortably while using the big toilet.