I'm somewhat convinced that the Elmo Potty Time DVD taught my kids to use the toilet. So I was really excited to see the Potty Time With Elmo app ($3). Based on the book, rather than the DVD, the app includes the story of Elmo teaching his doll how and when to use the toilet through a storybook. There are also five potty-themed songs (e.g., "I Am Waiting on the Potty" to the tune of "I've Been Working on the Railroad," etc.), some jigsaw puzzles, and a rewards chart that unlocks new stickers as actions are completed. For the lil Elmo fan out there, this app may be all that's needed for potty training.
Potty Time With Elmo