National Geographic for Kids http://www.nationalgeographic.com/kids/
Smithsonian National Zoo Webcams http://nationalzoo.si.edu/Animals/WebCams/
Monterey Bay Aquarium Webcam http://www.mbayaq.org/efc/cam_menu.asp
HHMI - Cool Science for Curious Kids http://www.hhmi.org/coolscience/
Magic School Bus Scholastic Kids http://www.scholastic.com/MagicSchoolBus/