It is a running joke with my students that I cannot draw a circle. Unfortunately it is often necessary for a math teacher to draw circles. The very best of my attempts end up looking like eggs - and really pathetic eggs at that! I just laugh right along with them and say, "There's a reason I teach math and not art!"
The artwork above is by my middle child, age 12 - merely some doodles he was doing in the car one day. It is clear that he gets his "art genes" from his father and not his mother!