PRIMO 4-In-1 Soft Seat Toilet Trainer Teach your little one to use the potty like a big kid! The Primo 4-in-1 Soft Seat Toilet Trainer & Step Stool is the only toilet training system parents will ever need. The unique soft seat is easy to clean and will not rip or tear apart like cushions. The 4-in-1 Soft Seat Toilet Trainer & Step Stool by Primo provides a stool for extra leg support. This also comes handy for washing little hands at the sink.