Most childrens step stools measure 13cm to 17cm high the pourty up step is a little taller at 21 cm high which is beneficial to the toilet training child because children are tending to potty train at a later stage these days they are tall enough to step on to a higher step stool this extra height makes it easier for the child to get onto the toilet or reach the sink or counter also research shows that when a childs feet are supported instead of dangling it helps them to go to the toile