Describes experiments involving simple machines that follow the scientific method, explores the use of levers to control motion and lift, and shows how the steepness of inclined planes affects the force needed to move something.

Do your readers wait until the last minute to start their science project? Don't worry, award-winning author Robert Gardner has everyone covered. Each experiment in this book follows the scientific method, and can be completed in an hour or less. Readers explore using levers to control motion and lift, and how the steepness of inclined planes affects the force needed to move something. Most experiments also include ideas for science fair projects, in case readers have more time than they originally thought.

"Simple Machines! introduces kids to the concept of mechanical advantage and harnesses kid-power by inviting them to build machines of their own design. This book also opens eyes and minds to the diversity of machines in their lives, and sparks the imagination with challenge, humor, and achievable projects"--Publisher.

A valuable, one-stop guide to collection development and finding ideal subject-specific activities and projects for children and teens. For busy librarians and educators, finding instructions for projects, activities, sports, and games that children and teens will find interesting is a constant challenge. This guide is a time-saving, one-stop resource for locating this type of information—one that also serves as a valuable collection development tool that identifies the best among thousands of choices, and can be used for program planning, reference and readers' advisory, and curriculum support. Build It, Make It, Do It, Play It! identifies hundreds of books that provide step-by-step instructions for creating arts and crafts, building objects, finding ways to help the disadvantaged, or engaging in other activities ranging from gardening to playing games and sports. Organized by broad subject areas—arts and crafts, recreation and sports (including indoor activities and games), and so forth—the entries are further logically organized by specific subject, ensuring quick and easy use.

"Find out how energy is stored, transferred, and changed, what conducts and what stores heat, and how to change matter from a solid to a liquid to a gas"--

"Quick science experiments using the human body"--

Introduces simple machines, including screws, levers, wedges, and pulleys, describes how each makes everyday life easier, and provides activities demonstrating these machines in action.