Brain Quest: Grades 3 & 4 - Nintendo DS Over 6,000 unique questions Brain Mode allows kids to jump right in, immersing themselves in fast-paced quiz games, as they answer questions on their favorite subjects - English, history, math, science, and geography Quest Mode takes kids through a light, fun story world where they will play quiz games to solve problems Kids of all ages can get in on the action and enjoy the brain-twisting fun with Hot Swap Multiplayer quiz games featuring both versus and cooperative games The game also features Sudoku specially tailored to kids of all ages, with 4x4, 6x6 and 9x9 puzzles