PRIMO’s 4-In-1 Soft Seat Toilet Trainer / Step Stool is a complete graduated 4 stage toilet training system! It follows your child through all of the stages of toilet training – 1) beginning as a stand-alone potty with an extra large easy to clean pot, 2) graduating to the adult toilet with the PRIMO Soft Seat Reducer and step stool, 3) using the step stool to reach the bathroom sink to clean hands, and 4) traveling with the PRIMO Soft Seat Reducer to continue and reinforce toilet training skills learned at home.