S.K.
I have two that worked great. First is the 1st year one that others talked about. It's a potty chair that can be converted to step stool and seat on a real toilet. We only used it as a potty chair. My older girl preferred this when she first learned. Second is a toilet seat reducer. It's caled Primo Ducka, search for it on amazon. It fits great on all toilets. We take it with us when we travel. My oldest refused to go #2 on the little potty chair, but when she saw the duck, that was it! Boy were we relieved she preferred the duck for #2!