"Red Kangaroo sees a plane in the sky and wants to fly just as high! Once she's learned about the four forces needed for flight-weight, lift, thrust, and drag-Red Kangaroo earns her wings! In this new series, Chris Ferrie answers all the questions Red Kangaroo has about what things are made of and how things work using real-world and practical examples. Young readers will have a firm grasp of scientific and mathematical concepts to help answer many of their "why" questions." -- Provided by publisher.