Try these links for fun SCIENCE learning.
http://www.fossweb.com/modules3-6/
http://www.edheads.org/activities/
http://www.sciencebuddies.com/
http://sv.berkeley.edu/showcase/pages/bones.html
http://www.bellmuseum.org/ecogames.html
http://www.msha.gov/KIDS/MINING.HTM
http://www.microscopy-uk.org.uk/index.html?http://www.microscopy-uk.org.uk/intro/index.html
http://www.childrensmuseum.org/special_exhibits/bones/games/Game1_FINAL.html
http://www.learningcircuits.co.uk/
http://www.hyperstaffs.info/work/physics/child/index.html
http://www.ngfl-cymru.org.uk/vtc/learnpremium/electric_circuits/Introduction/default.htm
http://www.miamisci.org/af/sln/frankenstein/safety.html