Mighty Maddie - Mathstart, Level 1 Author:Stuart J. Murphy 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... more » heavy.« less