Today we celebrate the Earth.
There's many ways to care and protect the Earth. You can find it in http://www.earthday.org/
Choose the way you can act, it's easy actions that we can do everyday. Also, this official webpage has a section for kids and schools.
I found also this cool website http://earthday2011.com/tag/earth-day-2011-date. Here you can find Earth Day trivia, Q&A, merchandising.
So, have a nice Earth Day. Everyday.