Sand + Air = Liquid When air is passed through a bed of sand, it tends to behave much more like a liquid. A demonstration kit form 1950s is brought back to life. Why isn’t this a toy for kids yet? Maybe because it would make the kids want to drink the sand. Facebook Prev Article Next Article Experiments Checkout these cool gadgets... Related Posts How Much Paper Does it Take to Stop a 50cal Spinning-up a golf ball using only compressed air and your hand The Smoke Waterfall Trick Macgyvering a Cement Truck Copper’s Surprising Reaction to Strong Magnets Structural Failure of a Coke Can Induced by Gallium 2 Comments Hasseli January 19, 2014 Looks very nice, I have to make one. HIGH T3CH January 19, 2014 If you do make one, send us some footage !