I have an idea for a coffee table that I’d never ever get bored with.
In the video above they are using different frequencies to vibrate the metal, which causes the sand to move into an amazing collection of different patterns as the frequency changes.
I’m imagining a glass topped coffee table with a layer of sand underneath and something to switch between the different frequencies. The sand art would be constantly changing forms, morphing from one shape into another. One small problem with it is that it’d require a power lead or battery to operate, but something that you could work around for having a spectacular kinetic art installation in your living room.