July 14, 2014 at 12:30PM
from Amazon.com Gold Box Deals http://ift.tt/1rcZCxt
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| The Pitsco Torsion Catapult Kit provides students in grades 6-12 a hands-on activity to build a model torsion catapult that demonstrates the scientific concepts of force, tension, torque, simple machines, and Newton's laws of motion. | |
| Expires Aug 11, 2014 |
from Amazon.com Gold Box Deals http://ift.tt/1rcZCxt
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