Learning to make stars with more than five points. Then of course I added the lesson: erase all unwanted lines, draw with Sharpie the lines you want to keep, add color with colored pencils using value change (GM3) and using a black crayon on it’s side to color the background (a small naked crayon works the best).

Resources:
This is Not a Maths Book: A Smart Art Activity Book
https://www.amazon.com/This-Not-Maths-Book-Activity/dp/1782402055

Vi Hart