Simple machines site http://www.edheads.org.l
National Geographic for Kids http://www.nationalgeographic.com/kids/
Included in this site are photos and detailed descriptions of each of the seventeen types of penguins and their habitats. http://www.siec.k12.in.us./~west/proj/penguins/main.html
http://www.funbrain.com.
Great site packed with weather information http://www.weatherwizkids.com.
Wonderful site for virtual owl pellet dissection http://kidwings.com