NEW VIDEO where I built a fluidized air bed in a hot tub with sand and then tested the principles of buoyancy with my nephews... by throwing them in. https://goo.gl/gvJrDy | Mark Rober
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NEW VIDEO where I built a fluidized air bed in a hot tub with sand and t…
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3.4K views | This is a liquified sand hot tub developed by an ex-NASA engineer. | GIAdventure | Facebook
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