Earth Day (or any day links):
http://www.primarygames.com/holidays/earth_day/earthday.php
http://www.thekidzpage.com/celebrationsforkids/earthday/
http://www.ecokids.ca/PUB/games_activities/index.cfm
http://www.energyquest.ca.gov/
http://climatekids.nasa.gov/
http://kids.nationalgeographic.com/kids/games/actiongames/recycle-roundup/
