She said the book must be both true and educational. When she heard about the adventures of Nils, she decided to write everything he saw from the back of a goose. That sounds strange. Honestly, that is quite ironic since we are already in that book. Suddenly, Sophie felt something tickle her cheek and a minute later she had grown no bigger than a thumb. Hamster Your Butt Napkins My Lord poster. The tree was like a forest and the goose was as big as a horse. Sophie walked along the tree branch and climbed onto the goose’s back.