George has finished drawing the greatest drawing ever, but The Man with the Yellow Hat does not have any good magnets to hang it on the refrigerator with. So, he and George go to the museum to find more and discover the museum’s new magnetorium where George learns all about magnetism. He learns that only certain thing attract to a magnet and that any metal that is attracted to a magnet can be turned into one. Soon, George loses his drawing and his quest to find it leads his to the junkyard and a powerful electromagnet.