Surely you jest--the educational part of the store is completely overwhelmed with educational games and activities.
I've sold over 3,000 copies of my XyPhone app in the past 2 months, if that helps answer your question. (Of course, sales are down to a trickle now.)
Craig
My son was playing a lot with my iPhone, and now he's playing with my iPad...
He loves playing educational games and particularly these ones: http://ar-entertainment.net/learning/ipad.html
The "Learning is fun" is the right title for this game collection.
Really nicely done, smooth graphics, fun sounds and animations, these games are really good for the kids.