http://www.bbc.co.uk/schools/ks2bitesize/science/activities/earth_sun_moon.shtml
http://www.planet-science.com/categories/under-11s/what-do-you-know-about/2010/09/what-do-you-know-aboutthe-seasons.asp
Planet Hop (good review for order of planets) http://www.scholastic.com/play/planet.htm
http://www.sciencenetlinks.com/interactives/shapeitup.html
http://www.fossweb.com/modules3-6/MatterandEnergy/index.html
http://www.bbc.co.uk/schools/ks2bitesize/science/activities/keeping_warm.shtml
http://www.engineeringinteract.org/resources/siliconspies/flash/concepts/buildingcircuits.htm
http://science.education.nih.gov/supplements/nih3/hearing/activities/lesson3.htm
http://www.fossweb.com/modules3-6/MatterandEnergy/activities/reflectinglight.html
http://www.bbc.co.uk/nature/blueplanet/webs/flash/main_game.shtml
http://teacher.scholastic.com/activities/explorer/ecosystems/be_an_explorer/map/foodweb_play.htm