Maddie's room is a mess. Maddie's toys are everywhere. And Maddie has to clean them up before her birthday party starts. This looks like a job for ... MIGHTY MADDIE Faster than a speeding bullet, more powerful than a vacuum cleaner, Mighty Maddie, the room-cleaning superhero, gives readers a playful lesson about the difference between light and heavy.

　Mighty Maddie must clean her messy room, but to her a toy train is heavy and a teddy bear is light. Readers don't have to be a super hero like Maddie to learn the difference between heavy and light. Full color.