When Nintendo announced Brain Age: Train Your Brain in Minutes a Day, we were skeptical. After all, how fun could reading and math minigames be? Turns out, they were fun, and the simple presentation but ever-increasing challenges kept us coming back for more. So when Big Brain Academy, a sequel of sorts to Brain Age was announced, we were pretty excited. Now that we've gotten our hands on Big Brain Academy, well, we're a bit underwhelmed. While there's a much larger variety of games in Academy than in Brain Age, the game seems to have lost some of its charm in the development process. It's still good fun, just not as fun as Brain Age, but for $20, it's definitely a good way to keep the old gray matter sharp.