Would agree about Wide World of Sports- despite Disney's attempts to convince you otherwise, it really is no more than a training facility for sports teams, albeit a very good one.
They have a baseball stadium and loads of smaller pitches, softball, football (US), football (soccer!) and various indoor facilities. The only "attraction" in the normal sense is the NFL Experience, which allows you to kick footballs at targets and make tackles on dummies etc, but this would not by any stretch of the imagination appeal to many kids, take it from me. Only for real NFL aficionados.
There is an All Star Cafe, but it really isn't worth the trip just to go there. Nothing wrong with the WWOS as a training facility if you're a touring sports team, but I certainly wouldn't call it a tourist attraction.
DisneyQuest is good fun, but maybe younger kids would be bored easily. But then you can ship them off with Mum to the shops in Downtown Disney while you play the games!