Here are some Global Warming sites geared towards kids to help your planning processes:
http://www.clean-air-kids.org.uk/globalwarming.html
http://www.kidzworld.com/article/17859-the-kids-guide-to-global-warming
http://tiki.oneworld.net/global_warming/climate_home.html
http://www.imatteryouth.org/home.html
http://www.clean-air-kids.org.uk/globalwarming.html
http://www.kidzworld.com/article/17859-the-kids-guide-to-global-warming
http://tiki.oneworld.net/global_warming/climate_home.html
http://www.imatteryouth.org/home.html