http://www.technologystudent.com/ Design and technology and everything about gears, pulleys, robolab abd more
http://weirdrichard.com/screw.htm Lego gears explained
http://www.enchantedlearning.com/physics/machines/Levers.shtml Levers explained
More on levers http://www.wonderville.ca/v1/activities/levers/levers.html
http://www.mos.org/sln/Leonardo/InventorsToolbox.html Simple devices explained. Leonardo's toolbox!
http://www.galaxy.net/%7Ek12/machines/index.shtml All kinds of machines and experiments to make and perform in easy to read format
http://www.windmillworld.com/ Windmill world
http://www.physicsclassroom.com/mmedia/index.html The laws of physics explained and demonstrated
http://www.fi.edu/qa97/spotlight3/spotlight3.html Simple devices explained and how they can be used to make humans work much easier.
Explore simple machines at home, work and play
http://www.schools.utah.gov/curr/science/sciber00/8th/Machines/sciber/intro.htm
http://www.edheads.org/activities/simple-machines/frame_loader.htm http://teacher.scholastic.com/dirtrep/simple/plane.htm http://staff.harrisonburg.k12.va.us/~mwampole/1-resources/simple-machines/ http://atlantis.coe.uh.edu/archive/science/science_lessons/scienceles1/finalhome.htm http://www.enchantedlearning.com/physics/machines/Levers.shtml
http://www.howstuffworks.com/index.htm Search for info on absolutely anything to find out how it works