Braille Institute - Shape Exercise

This past Wednesday at the Braille Institute, the teacher led an exercise teaching students how to recognize when other people are nearby. He walked in a shape, making a monotone noise and the student had to guess the shape based on his sound. I tried guessing with my eyes closed a couple of times and it was tough! I could tell the difference between a circle, line and triangle, but squares and circles were much harder to differentiate from one another. Here is just a little sketch, thinking about those concepts.