Hocus Focus cards are very scarce cards, particularly in what collectors call "well-developed" condition. Hocus Focus cards were one of a genre of "spit-to-see" card novelties that Topps tinkered with in the 1940s and 1950s. Instructions called for wetting the front surface of the card and holding it to the light to develop the hidden picture. From this unique and desirable set comes these 16 cards including Babe Ruth PSA GOOD+ 2.5, Jackie Robinson PSA EX 5, Wally Moon EX-MT 6, Hockey NM 7, Buffalo Bill, ARS 1301, Mount Rushmore, Convair "Ficon," Thomas Edison, Diving, Annie Oakley, Grand Canyon, Boeing "Bomarc," Alexander Graham Bell, S-200 "Minijet," and Cycling.