So, how are your sidewalk chalk drawing skills? The best I can do with sidewalk chalk is draw lines and tic-tac-toe boards. That's it.  But, the guy in the video has impressive art skills with chalk. I find it impressive that he is doing all this with chalk, and in 3D nonetheless. The artist's name is Chris Carlson. And, in the end credits of the video, it says 11 hours--I'm assuming that's how long it took to draw this masterpiece. Wow, that is some major concentration and dedication!