Brain Quest - Grades 3 & 4 (USA) (Japanese Title: ブレインクエスト 3・4 年生) is an educational game for the Nintendo DS. Developed by Digital Kids, the game is designed to help children in grades 3 and 4 in the United States learn and review the material they have studied in school. The game includes over 3,000 questions in the areas of reading, math, science, and social studies. It also includes an interactive map that allows players to explore the world and learn about geography. The game also includes mini-games and puzzles to help reinforce the material. The game has an adjustable difficulty level, so that players can challenge themselves as they become more familiar with the material. With its colorful graphics, engaging gameplay, and educational content, Brain Quest - Grades 3 & 4 (USA) is a great way for children to learn and have fun at the same time.