Potty chairs are proportionately small chairs or enclosures with an opening for seating very young children to "go potty" (a.k.a. poop, defacate, crap, make kaka, etc.). It is a variant of the close stool which was used by adults before the widespread adoption of water flushed toilets. There are a variety of designs, some placed directly over the toilet so the egested fecal material (poop) drops directly into the toilet bowl thereby eliminating manual removal and disposal of the said poop from a receptacle beneath the hole which is often a bag or receptacle similar to a chamber pot. If the child stays in the correct position, of course. Potty chairs are used during potty training a.k.a. toilet training.