Explains how and why ramps and other inclined planes are used in everyday life.

Describes many different kinds, uses, and benefits of pulleys. Provides examples of pulleys by showing a flagpole, a crane, an elevator and window blinds.

A New York Times Notable Children's Book for 2011 Samantha can't wait to try out her new roller skates, but Mama's too busy too help her. What's a girl to do? Well, this girl isn't waiting. While Mama tends to other things, Sammy straps on the skates. First she glides down the hallway. Then she tries the sidewalk. Next, she ventures a bit farther down the street. She's doing great! But when she finds herself cresting Hawthorn Hill, it's too late to stop-- Samantha is on a roll!

Matty Lyon's skateboard tricks are even more impressive since he's blind.

On a hot summer day, Tina is initially too afraid to go down a big slide at the swimming pool until some new friends offer their help.

The weels push, race, stroll, fly, whiz, and spin all day long.

Takes a look at ramps and wedges, what they are, how they are used, and how they help us.