Science

Food Chain
http://www.sheppardsoftware.com/content/animals/kidscorner/games/foodchaingame.htm

http://www.ecokids.ca/PUB/eco_info/topics/frogs/chain_reaction/play_chainreaction.cfm

http://www.sciencekids.co.nz/gamesactivities/foodchains.html

http://akidsheart.com/animals/sea/foodchain/foodchain.html