On these pages you'll see some common bridge designs and descriptions of their structure. See photos of famous bridge designs. Then learn about contests that allow students to build a bridge from toothpicks, following strict design rules. Also included is a simple formula for determining the winner of such a contest! There are also instructions for students on how to get started with their bridge, bridge designs using marshmallows, and a virtual bridge building page, where you can experiment with toothpick designs right here on your computer! About Bridge Structures Types of bridges, and important terms I-Beams How they work Bridge Photos Actual bridge designs Using Toothpicks A bridge-building contest Make a Plan How to start your bridge Try It With Marshmallows Quicker and easier, but not as strong See attempts with straws and plasticene too Build a Bridge Now Build a virtual bridge right here! You might also be interested in our page about the Tacoma Narrows bridge disaster. We have pictures and a short video. Visit the Tacoma Narrows Bridge page. Resources