Mary Catherine's class is on a field trip to an amusement park, but it isn't just fun and games, there's also plenty of science behind every ride. Why does Mary Catherine feel weightless as she plunges down a hill on a rollercoaster? She and her friends are determined to find out. This entertaining play is a fun introduction to physics. Concrete examples of complex concepts help readers process important information. Charming illustrations and goofy jokes keep readers on track as they learn about the wonders of physics.