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Books

Toy Cars
Toy Cars
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Using Ramps And Wedges
Using Ramps And Wedges
A ramp is a simple machine that makes it easier for us to move things. A ramphas a bigger distance along the slope than it has along the vertical distance.Fi... »
 
 
 
 
 

J.J. Stories
J.J. Stories
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Forces: The Ups And Downs
Forces: The Ups And Downs
The Ups And Downs »
 
 
 
 
 

Using Levers
Using Levers
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Electricity
Electricity
Turn It On! »