Summer Infant All in One Potty Seat and Step Stool The Summer Infant All in One Potty Seat and Step Stool is the perfect way for a parent to train their child to use the potty. It is a 4 piece potty and includes a step stool which is a great accessory. The potty chair from Summer Infant also includes a removable seat which transitions it into an adult like toilet for when the child is a little bit older. The drop in pot makes cleaning up this potty easier than ever. The non slip rubber feet and comfortable seat make this potty chair as good as it gets.