The POOF-Slinky 1120 Slinky Science Fingerprint Files Kit will quickly turn anyone into a "junior detective" by locating hidden fingerprints with methods used by the real Police and FBI. Currently, there are 6-billion people in the world and each one has a completely different set of fingerprints, even identical twins. They cannot be altered or removed because the fingerprint exist on every layer of the skin and will always grow back. The natural oils and sweat that your body produces collect in these ridges of skin so that when you touch things you leave behind an impression of your print. Today there are more than 250-million criminal and civil fingerprints on record in the U.S.A, with that number increasing each day. All of these fingerprints used to be kept on file cards, like the ones in this kit. This contains everything you need to find hidden fingerprints around the house by using the dusting kit and 16-page instruction booklet. Time to learn how the police and FBI have solved crimes for decades! The Fingerprint Files Kit includes a dusting brush, magnifying lens, (8) fingerprint cards, mirror, bottle of dusting power, (3) sheets of tape, an inkpad and instruction booklet. This Slinky Science experiment is number 163 of a series of science kits that combine the elements of learning and fun to provide hours of educational entertainment. The POOF-Slinky 1120 Slinky Science Fingerprint Files Kit is recommended for children 8-years of age and older. POOF-Slinky is the manufacturer of the world famous Slinky and the top selling POOF foam sport balls in North America, both manufactured in Plymouth, MI and Hollidaysburg, PA. Ideal and Scientific Explorer are other well-known brands, rounding out the POOF-Slinky family. With roots in the toy industry for over 100-years, POOF-Slinky brands continue to grow and broaden. New generations of kids, their parents and grandparents have proven that classic toys never go out of style!