Anyone looking for a cool school science experiment? Vancouver, BC, Canada / Rock 101 - Greatest Hits 70s 80s & 90s Kim Seale December 01, 2017 04:40 am I give you the Liquid Sand Fluidized Air Bed…. Fluidized beds are used in industry for various reasons. They also happen to be really cool to play with and swim in. This guy made a liquid sand hot tub by adding air in just the right way.