This Water Games by israeli's Studio Kahn. Water Games is project that can light up each X and O spot in tic-tac-toe game by your fingers. Water Games is made from a porcelain shell framed in a wood box. Players dip their fingers in circles filled with water, which light up green or blue on contact. Underneath the porcelain unit lies a complex matrix of wires that make the magic happen. See the below video!
