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 Soccer Ball Shot from Truck, Interesting Result What Happens When 500 People Trace The Same Line? How Many Strips of Packing Tape Does It Take To Lift A Car? What Would Happen If Water Filled Up A House? What Happens When You Try to Skydive With an Umbrella? Will A Leaky Airplane Toilet Lead To A Deadly Ice Chunk?