Water Light Graffiti by Antonin Fourneau for DigitalArti Artlab

Water Light Graffiti is made of thousands of LED lights that light up when they come into contact with water.

Participants can use paintbrushes, sponges, fingers or spray cans to sketch out words and pictures.

(Reference: https://www.dezeen.com/2012/08/20/water-light-graffiti-by-antonin-forneau-for-digitalarti-artlab/)