I guess that is where the real money is in kids games..
Christmas Easter Summer Break Birthdays
and of course
the thinking by a parent that the game can help their child do better in school... then the game could be purchased at anytime.. The key to those parent impulse sales would be to have RR in the big box retailers and not just Gamestop.
I really don't know how that isn't going to happen at some point in the near future.. The Walmart close to me has room for about 100+ DS games.