"To produce the jaw-dropping video you see above, YouTube user Brusspup took a subwoofer - a speaker which provides deep bass tones for music - and set it to the same frequency as the frame rate of his video camera."
Great for elementary science classes when learning about the climate of the earth. Topics include weather & climate, air, ocean, fresh water, energy, plants & animals, carbon's travels and technology. There are videos, games and activities to use in the classroom.