My DD is 18 months and 32 inches tall and is starting to brush her own teeth. We might even pt soon. The bathroom she will use is small and we all use it during the day, so it would be better if the stool was reasonably moved or thin or at least not something you find yourself tripping on all the time. A quick glance on Amazon reveals Elmo and similar stools--but I'm not sure she'll like Elmo when she is 5 and still cannot reach the sink. Some small stools seem like they wouldn't work because they are too short. There are a few cute 2 step wood ones, but the prices are ~$80. There are some folding ones, but then the reviewers are like, "my toddler had to go to the ER when this collapsed." Do you have one you like?