Diego Potty Chair - 3 in 1 Benefits: Start your child with using the potty chair on the floor. The bowl is removable and the contents can be flushed down the toilet. Can be used for children ages 18 months to 4 years. Once your child is old enough to use the toilet, the detachable potty seat fits on top of a regular or elongated adult toilet seat. The base of the potty seat is flipped over to now become a step stool.The step stool can be use to assist in climbing on and off the toilet and reaching up to the sink to wash the little ones hands.