A big lion is sleeping under a tree. A little mouse runs on his nose. The lion wakes up. He is angry!
"Please don't eat me," says the mouse. "One day I can help you." The lion laughs, but he lets the mouse go.
The next week, the lion is in a net. He can't get out. The little mouse comes and cuts the net with her teeth. The lion is free. Small friends can be great friends!