MatheZoo is a charming math game for children: Addition, subtraction, multiplication, and division, freely selectable, with four difficulty levels. By calculating, virtual coins can be earned, which can be used to build a zoo. Animals, enclosures, food, and, as the game progresses, animal sounds, even the zoo director's crown, can be obtained with these coins. This keeps motivation high for young and old alike, so that the chosen math level and calculation types (both can be adjusted as the game progresses) are continually reinforced. The math statistics make it easy to see which calculation types are already mastered and which require further practice. As the zoo grows, confidence with the selected math levels grows almost automatically.