Once you put them on, you'll understand how much fun these glasses are. Everyone who experiences them....loves them. Just put on the specs and turn toward a pinpoint source of light (they don't do their magic with a regular bulb) - look at a candle flame, Christmas Tree type bulb, traffic lights, car headlights or tail lights. With this pair -- perfect for St. Patrick's Day -- you'll view multiple hologram images of the words GOOD LUCK. When you first put the glasses on you'll see the word GOOD, then tilt your head slightly and the word LUCK will appear! A great party favor for all ages. Cardboard construction. Sold as a set of two.