Its Fun to be Smart! Challenge yourself with 6,000 questions designed specifically for Grades 3 amp; 4 Based on the bestselling education series of all time, Brain Quest on DS is finally here! Available separately for Grades 3amp;4 and Grades 5amp;6, each comes with 6,000 exciting questions! Learn while you explore in Quest Mode. In Brain Mode, try your best at 6 different subjects. Still hungry for knowledge? Try multiplayer Mode or Sudoku! Unlock collectibles and customize 6 fun scenes!