TopDir - top sites directory

TopDir is a human edited web directory with various categories, a collection of hand-picked web resources for visitors

TopDir offers free website promotion for webmasters and website owners. Relevant search results and many categories for adding and promoting websites. Free web promotion for websites at TopDir directory. Submit your url for review. A collection of hand-picked web resources for visitors. This page is focused on one particular aspect of Kids and Teens, School Time, Science, Technology, Buildings and Bridges, Model Bridge Building.

http://www.abcdpittsburgh.org/kids/kids.htm

» ABCD's Bridge Design Tips for Kids [ Teens/Mature Teens ] - Provides tips for bridge-building projects, including topics such as form, connections, properties of balsa wood, links, and a bibliography.

http://www.geocities.com/CollegePark/Campus/6697/CPS/structure1.htm

» Balsa Structure Tips [ Teens/Mature Teens ] - Offers advice on studying balsa wood to ensure good pieces.

http://www.zimsweb.com/balsa/information/info.htm

» Balsa Wood Bridge Info [ Teens/Mature Teens ] - Very detailed instructions on the construction of model bridges. Also has charts showing the properties of Balsa wood.

http://www.iit.edu/~hsbridge/database/search.cgi/:/public/index

» Bridge Building Contest [ Kids/Teens/Mature Teens ] - Description of a model bridge building contest. Also has tips on how to start your own contest.

http://www.yesmag.ca/projects/bridge.html

» Bridge Over Cardboard Water [ Kids/Teens ] - Contains instructions on how to build a toothpick truss bridge. Includes a print-friendly version.

http://www.geocities.com/Baja/8205/truss.htm

» Bridge Truss Designs [ Kids/Teens ] - Pictures of various standard trusses including the Warren, Howe, Pratt, and different variations.

» Model Bridge Design [ Kids/Teens/Mature Teens ] - Tips and advice about designing and building model bridges from basswood and balsa.

» Physics Balsa Bridge Building Contest [ Teens ] - Records, rules and tips for this twenty year old contest along with hundreds of photographs of bridges.

http://projects.edtech.sandi.net/pbmiddle/bridges-tech/

» Technology and Bridge Design [ Teens/Mature Teens ] - A bridge building activity with glossary terms.

TopDir is a human edited web directory with various categories. Our mission is to organize theme based websites and remove the clutter from the information. We strive to provide context based website results to our visitors. This directory is an evolving one and we regularly add new categories, if there is a necessity. Members can suggest new categories and websites for inclusion. This is one stop promotion site for webmasters and website owners. We invite you to browse the categories and suggest your website url for an editor review. This page is focused on one particular aspect of Kids and Teens, School Time, Science, Technology, Buildings and Bridges, Model Bridge Building.

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Web directories list the websites by theme. The links in a web directory are collected, edited and organized by humans. Yahoo and Dmoz ODP(Open Directory Project) are considered as the best human-edited web directories on the Internet and they are one of the most trusted and relied traffic sources. Since these directories get thousands of submissions every day, it is sometimes difficult to get listed in them and your URL may take a long time to be reviewed and listed. Generally good directory listings give a surprise boost to your link popularity.