[Update: April 2013]
I should have updated this post long time ago. Just a month after my post Agnitus launched its App Trailer. I recently found out about this App (currently on the Apple AppStore) and I am thrilled about its capabilities. My 2-year old daughter is using it every other day and I can see her progress on the scorecard.
Another game studio that has a promising product is Mapache Studios. Mapache Studios is an Edutainment Media Company that develops games for mobile education. They use the game mechanics of the most popular games such as Angry Birds and Cut the Rope to make extremely fun and engaging games.