Knock Knock Deck of Cards, Fifty Barfs Deck of cards serves as a taxonomy of human emesis according to sight, sound, and other key indicators Meticulously researched; peer reviewed Not just a great joke gift, also increases vocabulary and can be used to play card games Deck of 52 cards, each 3.75  2.5  0.75-inch Includes the doggie bag, new year's heave, technicolor yawn, special delivery and more