Why are Bridges So Strong?
https://youtu.be/oVOnRPefcno

Watch Them Build a Bridge
http://viewpure.com/vKGYs71N72c?start=0&end=0&mc_cid=bd629fc3ad&mc_eid=7d203f0cfe

Bridges Resource Site
http://web.archive.org/web/20091008071033/http://www.pbs.org/wgbh/buildingbig/bridge/index.html

Bridges- A Brain Pop video
https://www.brainpop.com/search/?keyword=bridges

How to Build a Toothpick Bridge- YouTube
https://www.youtube.com/watch?v=DKgdUKhL5Cc&sns=em

Another How To Video- Popsicle Stick Bridge
https://www.youtube.com/watch?v=b9niGbPGqs8&sns=em

Build a Popsicle Stick Bridge to Hold 100 lbs!- YouTube Video
https://www.youtube.com/watch?v=_P5ynX7C98M&sns=em

Truss Bridges- YouTube Video
https://www.youtube.com/watch?v=llhSEwUE6cY&sns=em

How to Build a Popsicle Stick House- YouTube Video
https://www.youtube.com/watch?v=FKMOXJiPtAg&sns=em

How Do You Make a Strong Toothpick Bridge?- Grandma's website
http://newgrandmas.com/1509/funwithgrandchildren/math-funwithgrandchildren/how-do-you-make-a-strong-toothpick-bridge-frugal-friday

How to Build a Toothpick Bridge- eHow.com
http://www.ehow.com/how_4917866_build-toothpick-bridge.html