$5.00 Big Brain NINTENDO DS GAME (will only play in original ds, ds lite and dsi systems NOT 3ds systems)A stress reliever application for the DS, Big Brain Academy features 15 activities that test your brain powers in areas like logic, memory, math and analysis. Free your mind by working through a number of simple yet deep problems. There are five different types of challenges. The game is playable by all ages, with only one cartridge needed for eight players and each activity takes less than a minute to complete. * Practice mode lets you get comfortable with the game's fast-paced assault of problems. * Test is obviously the real thing, and it features an assortment of challenges that you'll have to solve quickly. * Versus mode throws out tests for eight players, requiring only one game pack. The game offers a special perk in that it displays the ongoing weight of your brain so that you'll be able to keep track of how you're doing during a match.