Another blast from the old-school past, the ClueFinders series is a Reader Rabbit for older kids. These games aren't so simple, and aim to improve abstract thinking with more complex puzzles, and an actual narrative to follow. This is an adventure game in all but name - but the puzzle structure really puts it closure to something like the Layton series.
Playing as a group of cluefinding kids, you go from screen-to-screen, completing various educational activities. There's less focus on pure reading comprehension in ClueFinders, with tons of math puzzles thrown in to tax both sides of your brain. It was a pretty good way to pass the time back in the golden age of educational games.