Having worked in computer retail for 20 years, there is one rule to follow, do not buy edutainment titles because they are so hard to sell. It does not matter how large your range is, people always manage to ask for something that you have not got. Plus parents stop buying them as soon as they realize the kids don't really want to use them.
It is a difficult market, that most people would think a massive market, but those difficulties I mentioned, and the fact that most are plain boring, stops them selling in ANY numbers. Plus once kids realize they are edutainment they tend to switch off. Unless you are PC world or such, stocking those titles is a liability.
There probably is a market for such, just that most mainstream companies producing it don't really have a clue what kids will play. Orley's draw a Story is an exeption that was always in demand, but was hard to find typically. That played on the simple fact kids like to draw. Hell it even had our saturday lads hooked at one point lol!
http://s6.bitefight.org/c.php?uid=103081