The Fisher-Price 3-in-1 Unicorn Tunes Potty grows with your child as they learn how to “go.” It starts as a training potty chair, with a sensor that rewards every success with fun sounds. Then, the removable potty ring helps your preschooler transition to the big toilet. The potty also converts to a sturdy step stool that helps your little potty-trainee get on and off the toilet and gives them a boost up to the sink.