Dragonfly Tv has great video clips of kids engaged in doing science. Episodes of DFTV are organized into Body & Brain, Earth & Space, Living Things, Matter & Motion, and Technology & Invention. There are supports for kids trying investigations on their own, science fair spinner (help you pick an investigation), and discrepant events (science surprises).
Applications for Science Teachers: This site is most appropriate for intermediate elementary school instruction. The video clips could be used to support science content instruction as well as modeling science inquiry skills. The online games and clips of Real Scientists could also be useful for classroom instruction.
Science for All 