Gakken Youten Rank Jun Series - Kagaku DS (Japan), 学研陽炎ランクジュンシリーズ活学DS is a collection of educational and fun activities for Nintendo DS. This game is geared towards elementary school children, and has a variety of activities to help them learn and have fun. The activities are grouped into five categories: Math, Science, English, Japanese, and General Knowledge. In each category, there are several different activities, such as quizzes and mini-games, that help players learn and have fun. The game also includes a ranking system, which allows players to compare their scores with those of other players. The game also includes a variety of mini-games that are based on popular characters from the Gakken Youten Rank Jun Series, such as the popular monkey character, Kojirou. These mini-games are designed to be fun and entertaining, while also helping players learn. Overall, Gakken Youten Rank Jun Series - Kagaku DS (Japan) is a great way for elementary school children to learn and have fun at the same time.