Bibi Blocksberg - Grundschule Mathematik - Klasse 1 bis 4 (バイビー・ブロックスバーグ小学校の数学１～４年生ディースーパー) is an educational game developed by Ravensburger Interactive Media GmbH and released for Nintendo DS in Germany in 2009. The game is aimed at children aged 6 to 10 and focuses on mathematics, helping them to learn and improve their skills in a fun and interactive way. It features over 200 different exercises, ranging from basic arithmetic to more complex calculations, as well as a variety of puzzles and mini-games. The game also introduces children to different concepts such as fractions, percentages and weights. The game is based on the popular German children's book series Bibi Blocksberg, with the player taking the role of Bibi as she explores the magical world of mathematics. The game features colourful graphics and a cheerful soundtrack, as well as a variety of characters from the book series. It also includes some bonus features such as a calculator and a virtual blackboard, allowing players to practice their math skills in a more traditional way. Overall, Bibi Blocksberg - Grundschule Mathematik - Klasse 1 bis 4 is an enjoyable and educational game that can help children to learn and improve their math skills in a fun and interactive way.