Try Science http://www.tryscience.org/home.html
Dept of Energy's Kid Zone: http://www.energy.gov/kidz/kidzone.html
Power Proofreading http://www.eduplace.com/kids/hme/k_5/proofread/proof.htm
Energy Web Quest http://www.energyquest.ca.gov/story/index.html
Amusement Park Physics http://www.learner.org/exhibits/parkphysics/coaster/
Puzzle Maker http://puzzlemaker.school.discovery.com/chooseapuzzle.html
Space Pioneers http://www.jsc.nasa.gov/Bios/astrobio.html
Weigh Off in Space! http://www.exploratorium.edu/ronh/weight/index.html
Weigh Off in Space! http://starchild.gsfc.nasa.gov/docs/StarChild/solar_system_level2/planet_hop.html
Weigh Off in Space! http://www.nineplanets.org/data1.html
Weigh Off in Space! http://www.nineplanets.org/
Which Eclipse Is That Again? http://www.exploratorium.edu/eclipse/why.html
Which Eclipse Is That Again? http://csep10.phys.utk.edu/astr161/lect/time/eclipses.html
Solar Eclipse in Jeopardy http://csep10.phys.utk.edu/astr161/lect/time/eclipses.html
Solar Eclipse in Jeopardy http://www.earthview.com/tutorial/tutorial.htm
Which Eclipse Is That Again? http://www.dustbunny.com/afk/skywonders/lunareclipse/
Solar Crossword http://www.solarviews.com/eng/sun.htm
By the Numbers http://seds.lpl.arizona.edu/nineplanets/nineplanets/sol.html
By the Numbers http://www.solarviews.com/eng/sun.htm
Renewable vs. Nonrenewable Energy http://www.eia.doe.gov/kids/energyfacts/sources/renewable/renewable.html
Renewable vs. Nonrenewable Energy http://www.eia.doe.gov/kids/energyfacts/sources/non-renewable/nonrenewable.html
Where Does Energy Come From? http://www.eia.doe.gov/kids/energyfacts/index.html
Where Does Energy Come From? http://www.energyquest.ca.gov/story/index.html
Be Safe with Electricity http://www.miamisci.org/af/sln/frankenstein/safety.html
Exploring Environmental web sites http://edugreen.teri.res.in/explore/air/air.htm
Exploring Environmental web sites http://edugreen.teri.res.in/explore/water/pollu.htm
Exploring Environmental web sites http://www.epa.gov/pesticides/about/#what_pesticide
Exploring Environmental web sites Recycle City
Exploring Environmental web sites http://environment.nationalgeographic.com/environment/habitats/rainforest-threats.html
Exploring Environmental web sites http://www.nationalgeographic.com/eye/deforestation/deforestationintro.html
Exploring Environmental web sites http://www.epa.gov/globalwarming/kids/bigdeal.html