Nino Hippo is sad in the meadow, and no one knows how to cheer him up. Herr Eddison has an idea and builds a happiness machine with Benjamin and Otto. They initially think Nino wants cherries, but that is not the reason for his sadness. Benjamin finds a ball in the tree, which Nino misses. They use the machine to free the ball from the branch, and Nino is happy again.