Het plan van Haas uses the gameplay and interface from the first game, but with new stories, drawings and games. It is most suitable for children from five to eight.
Piep, the chicken from the first game, has grown up. Owl now has a new egg, but he receives a strange note by mail. In the meantime, Hare puts Fox on a diet. The child reads along with the story and has to solve a puzzle at the end of every chapter to unlock the next part.