Most of the web resources have been given on each character’s page. A few additional links are provided below:

http://www.sciencemadesimple.com/animals.html

http://www.tomsnyder.com/classroom/scicourt/waterparsons.html

http://www.globalwarming.org/brochure.html

http://www.cotf.edu/ete/modules/k4/teacher/weather/Wonline1.html