Spray time itself on anything you want.
What’s cooler than a portable clock? A portable clock that sprays the time on the wall. The Gamago Spraycan Projection Clock sort of does this, by using a projector that can render the time on most flat surfaces. As expected, the casing of this clock makes it look like a spray paint can. Trick people into believing that you’ve painted the time on a wall, and watch them be relieved that it’s just a light projection.