ASPCA Animaland: Games, cartoons, polls, stories, and pet care guides from the American Society for Prevention of Cruelty to Animals.
Frogs are Cool: Organization which tries to get kids to not perform dissections as part of science classes.
Help Your Animal Friends: Easy-to-understand information about helping homeless animals, pet adoption, and animal cruelty. Designed by kids for kids.
HumaneTeen: Features true stories of teen activists and clubs making a difference for animals and the environment. Part of the Humane Society of the United States, site provides tips and action alerts on how to help animals.
Kids in Nature's Defense: Classroom newspaper for kids in grades K-6. Includes interactive clubhouse, games, Dr. Kind's answers to animal welfare questions, and resources for teachers.
PETA Kids: International animal rights organization explores welfare issues and suggests practical ways young people can make a difference. Includes online version of PETA's Grrr! magazine as well as information on avoiding dissection.
Scottish Society for the Prevention of Cruelty to Animals: Resources for teachers and pupils on pets, farming and wildlife. Includes interactive features and printable worksheets, as well as links to Scottish school curriculum.
The Kratt Club: Meet these two brothers who organized the creation a wildlife refuge, called Grizzly Gulch Creaturefuge, for bears in Montana. The entire refuge was built by kids. Includes mailing lists, appearance schedules, photos, and stories.