Just when you think you’ve seen all kinds of graffiti, another find surprises you. Antonin Fourneau introduces Water Light Graffiti system. A huge moisture-sensitive panel filled with LEDs that lights up once touched with water! What makes this even more enjoyable is that the grafitti is temporary and you can draw almost anything on it, like an awesome version of etch-a-sketch. Lucky visitors in Poitiers, France where it was displayed recently. Watch it on display here and how it was done here.