Helpful Hints for Mother Earth by a 2nd grade class
Planetpals.com
Sci4Kids: Recycle it!
Seuss Lorax Earth Day
Explorers' Club
Earth Day 2008
Fun School Games
What is Earth Day?
AborDay: Kids Corner

Interactive site that teaches kids all about energy
 NIEH Sciences Kids' Page(en Español)
US Fish and Wildlife Service Kid's Corner

Earth Day 911

http://www.epa.gov/globalwarming/kids/

Jimmy Neutron shows kids how to recycle cans