When you see your face in a mirror you are seeing light from your face reflecting off of the mirror. Light bounces off mirrors very much like a bouncing ball. You can throw a ball straight down, and it will bounce straight back at you. Or you can bounce a ball at an angle and it will bounce off the floor at the same angle away from you. Light reflects the same way off a mirror.
Light reflects from a mirror at the same angle as it arrives.
You need to work with a partner to do this activity. Find a place where there is a wall with plenty of space around it. Attach the mirror flat on a wall with masking tape. The mirror should be attached to the wall at eye level. Cover the mirror with a piece of paper.