Learn how to build a pillow fort with the help of the force called compression. Just save some room for us!

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SOURCES:

http://depts.washington.edu/matseed/mse_resources/Webpage/definitions/def_tension_more.htm
http://science.howstuffworks.com/engineering/civil/bridge6.htm
http://kids.britannica.com/comptons/art-18377/A-suspension-bridge-with-forces-of-tension-represented-by-red
http://www.explainthatstuff.com/howbuildingswork.html

source