Do you think you are good at entertaining people? Can you imagine doing tricks? Try amazing your friends with this illusion. Prepare by cutting small circles out of red or purple paper. Then put a black dot in the middle of each circle,and give one circle to each of your friends. Ask them to stare at the dots for 30 seconds without looking at anything else.Next,ask them to look at the ceiling and then at a wall that is at least 15 feet away. The circle they see will look much bigger when they look at the wall !!! They' ll be so impressed,they'll love showing the illusion to others.