"If a hungry little mouse shows up on your doorstep, you might want to give him a cookie. And if you give him a cookie, he'll ask for a glass of milk. Then He'll want to look in a mirror to make sure he doesn't have a milk mustache..."
If you take a mouse to school, he'll ask you for your lunch box. When you give him your lunch box, he'll want a sandwich to go in it. Then he'll need a notebook and some pencils. He'll probably want to share your backpack, too...