Point 2 is a reasonable concern, but in this case, I think it's fine. If a child draws interlocking rings with a crayon, it's impossible to tell which ring is o

Point 2 is a reasonable concern, but in this case, I think it's fine. If a child draws interlocking rings with a crayon, it's impossible to tell which ring is on top. So children can draw this without a problem, they just draw each circle in whatever order they want and it will look fine. The ordering concerns only come into play when using a medium that can represent which ring is on top at each crossing.