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Learn how simple machines make work easier in these colorful nonfiction picture books all about science and engineering!
How do you keep a truck from rolling? A door from closing? And how do you cut through banana bread?
All of these questions have the same answer—a wedge! Wedges are one of the simple machines that help make work easier by using mechanical advantage. In Wedges Make a Point: Simple Machines for Kids,
...Learn how simple machines make work easier in these colorful nonfiction picture books all about science and engineering!
Have you ever played on a seesaw? You were using a lever!
A lever is one of six simple machines that are designed to make different kinds of work easier. Lifting, pulling, pushing—all these tasks are more efficient when you use a simple machine. In Levers Lessen the Load: Simple Machines for Kids,
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