Summer Infant All in One Potty Seat and Step Stool - Pink The All-in-One® Potty Seat and Step Stool from Summer Infant covers three stages. Stage 1: A complete potty trainer on the floor. Stage 2: Toilet topper for standard sized toilet use. Stage 3: Step stool for accessing standard sized toilet and for promoting hand washing at the sink. - 4-piece potty and step stool all-in-one - Includes removable seat for adult toilet - Removable drop in pot for easy cleaning - Non-slip rubber feet on bottom for added safety - Unique design for comfortable seating