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Animals Back from the Brink

Be Your Best Self

Code Academy

Full STEAM Ahead!

Eco Facts

Epic Animal Journeys

Human Habitats

Leaving My Homeland After the Journey

Natural Disasters

Scratch Code Challenge

War Machines

Wildlife in the City

 

The Robotx Get Help from Simple Machines

Reading Level: Gr. 2-3    Interest Level: Gr. K-3
The Robotx are two small robots—RobbO and RobbEE— who spend their days exploring the technology of simple machines—and creating their own. Playful text and funny illustrations support information boxes and detailed photos to show young readers the mechanics of movement.


Pulling Up: The Pulley - HC
Pulling Up: The Pulley - HC
04171 | In Stock
US$27.60
US$20.70
 
Pressing Down: The Lever - HC
Pressing Down: The Lever - HC
04164 | In Stock
US$27.60
US$20.70
 
Sloping Up and Down: The Inclined Plane - HC
Sloping Up and Down: The Inclined Plane - HC
04195 | In Stock
US$27.60
US$20.70
 
Splitting Apart: The Wedge - HC
Splitting Apart: The Wedge - HC
04201 | In Stock
US$27.60
US$20.70
 
Winding Around: The Screw - HC
Winding Around: The Screw - HC
04218 | In Stock
US$27.60
US$20.70
 
Rolling Along: The Wheel and Axle - HC
Rolling Along: The Wheel and Axle - HC
04188 | In Stock
US$27.60
US$20.70
 
Pressing Down: The Lever - PB
Pressing Down: The Lever - PB
04225 | In Stock
US$9.95
US$9.95
 
Pulling Up: The Pulley - PB
Pulling Up: The Pulley - PB
04232 | In Stock
US$9.95
US$9.95
 
Rolling Along: The Wheel and Axle - PB
Rolling Along: The Wheel and Axle - PB
04249 | In Stock
US$9.95
US$9.95
 
Sloping Up and Down: The Inclined Plane - PB
Sloping Up and Down: The Inclined Plane - PB
04256 | In Stock
US$9.95
US$9.95
 
Splitting Apart: The Wedge - PB
Splitting Apart: The Wedge - PB
04263 | In Stock
US$9.95
US$9.95
 
Winding Around: The Screw - PB
Winding Around: The Screw - PB
04270 | In Stock
US$9.95
US$9.95
 

Ebooks cannot be ordered online. To order, please contact customer service by phone at 1-800-387-7650 or by emailorders@crabtreebooks.com. Learn more about Crabtree ebooks.
Pressing Down: The Lever - eBook
Pressing Down: The Lever - eBook
US$41.40
US$31.05
 
Pulling Up: The Pulley - eBook
Pulling Up: The Pulley - eBook
US$41.40
US$31.05
 
Rolling Along: The Wheel and Axle - eBook
Rolling Along: The Wheel and Axle - eBook
US$41.40
US$31.05
 
Sloping Up and Down: The Inclined Plane - eBook
Sloping Up and Down: The Inclined Plane - eBook
US$41.40
US$31.05
 
Splitting Apart: The Wedge - eBook
Splitting Apart: The Wedge - eBook
US$41.40
US$31.05
 
Winding Around: The Screw - eBook
Winding Around: The Screw - eBook
US$41.40
US$31.05