David Zinn uses rain-soluble chalk and charcoal. This allows him to draw on a whim without needing to obtain permission that permanent street art requires. And because it’s not permanent, Zinn hopes his work might inspire those who see it to pick up some chalk and create, too. The artist’s task is to show that you don’t need fancy drawing equipment.

His work has appeared on subway platforms in Manhattan, village squares in Sweden and street corners in Taiwan.

Street art that washes away in the rain. If he wanted, he could seal his art work to protect it from the elements. But then it may turn into graffiti and have legal implications.

If his artwork becomes valuable like Banksy, pretty soon people will be ripping out bricks and chunks of pavement with his art on it.