Building Circuits

http://www.engineeringinteract.org/resources/siliconspies/flash/concepts/buildingcircuits.htm

Engineering Is Awesome

Science Rocks

http://www.bbc.co.uk/schools/ks2bitesize/science/physical_processes/

Catapult Design Team

http://www.forgefx.com/casestudies/prenticehall/ph/catapult/design-test-simulation.htm

Virtual Electron Microscope

http://school.discoveryeducation.com/lessonplans/interact/vemwindow.html

Simple Machines

http://www.msichicago.org/fileadmin/Activities/Games/simple_machines/

Robot Factory

http://www.wonderville.ca/v1/activities/robot_factory/index.html