Lance Dragon explains how simple machines work while using them to defend the skate park in his castle.

"Introduces the reader to push and pull"-- Provided by publisher.

"Do you want to make the best paper airplane? Or perhaps centripetal force and the idea that water can defy gravity excites you! This is the book for curious young physicists, ready to learn more about the world around them. Each of the 10 projects includes a Background section to explain the science topic at work, materials, clear step-by-step instructions, and an Observations section walking readers through the results they likely saw. Several projects...

Energy is a vital part of our lives. It powers our computer, lights our home, and moves our car. It also costs a lot of money and pollutes our environment. In Energy: 25 Projects Investigate Why We Need Power and How We Get It, kids ages 9–12 learn about the history and science of the world's energy sources, from nonrenewable fossil fuels such as oil and natural gas to renewable sources such as solar and wind power. Sidebars and fun trivia break...

Text and experiments demonstrate the nature and uses of energy in its various forms.