Let's Fly a Plane!It's time to take #1 science author Chris Ferrie's unique brand of learning to the next level your little scientist will soar with aerospace engineering the science of flight! Equip the next generation of scientists with a brand new series from Chris Ferrie, the #1 science author for kids! How do airplanes stay up in the sky? That's the question Red Kangaroo needs answered and she knows exactly who can help her Dr. Chris! Explore the four forces of