Things That Float and Things That Don't
by David A. Adler | 
Perimeter, Area, and Volume
by David A. Adler |
Mystery Math
by David A. Adler |
Millions, Billions, & Trillions
by David A. Adler |
Grand Canyon
by Jason Chin | 
A Seed Is Sleepy
by Dianna Hutts Aston | 
Baby Loves Quarks!
by Ruth Spiro | 
Redwoods
by Jason Chin | 
Older Than the Stars
by Karen C. Fox | 
The Story of Snow
by Mark Cassino | 
From Seed to Plant
by Gail Gibbons | 
Optical Physics for Babies
by Chris Ferrie | 
The Secret Life of a Snowflake
by Kenneth Libbrecht | 
The Moon Book
by Gail Gibbons |
The Life and Times of the Honeybee
by Charles Micucci |
From Seed to Pumpkin
by Wendy Pfeffer |
Why Do Leaves Change Color?
by Betsy Maestro |
How Do You Lift a Lion?
by Robert E. Wells | 
What's Smaller Than a Pygmy Shrew?
by Robert E. Wells |
Tsunami!
by Kimiko Kajikawa |
Kids use simple machines every day without realizing it. Teeth are wedges and so are knives, forks, and thumbtacks. Many toys such as slides, which are inclined planes, and seesaws, which are levers, are also simple machines. Two appealing kids and their comical cat introduce levers, wheels, pulleys, inclined planes, and more, and explain how they work. This lively introduction to physics will get kids excited about how simple machines simplify our lives.