Great app, but only fun for a little while, and no educational value. – Elmo's Monster Maker HD Review

Considering it was a Sesame Street app, you sort of presume that it will be educational, but it isn't remotely educational. That said, it is pretty amusing with the types of things the monsters do. The app is essentially a number of videos that fit together and switch mostly seamlessly, making it it sort of seems like a live app. My son had fun with it, but the novelty wore off rather quickly.
Review by Sadiephillips on Elmo's Monster Maker HD.