Simplicity and confusion don't often go hand in hand. Here's a confusing puzzle, or "confuzzle", that can be made in minutes. Although it involves simple geometric principles, it is surprising and even baffling to some people. In short, it's a quick, easy project that is tons of fun to show others.
Here's a short video showcasing the presentation and effect of the puzzle:
Step 1: What you Need
1) Two different colors of posterboard (each measuring at least 8.5" x 8.5").
5) Black magic marker