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PBS
Blow the Roof Off!
Blow the minds of young scientists with this collection of inquiry-based investigations. Based on a series of eight videos, these "hands-on, minds-on" science lessons engage young learners in exploring a wide range of topics...
NASA
The Case of the Wacky Water Cycle
Join the tree house detectives in learning about the processes of the water cycle, water conservation, water treatment, and water as a limited resource.