Unveil the magic of numbers with the Amazing Insight 16 Math Magic Trick. This captivating set includes 16 alder wood cards, each measuring 1.3" x 4" x 1/8", deeply laser-engraved with numbers. Challenge friends and family to think of a number between 1 and 16, and effortlessly reveal their chosen number using these cards. Based on a classic mathematical principle rediscovered in Maurice Kraitchik's 1942 book, "Mathematical Recreations," this trick combines education with entertainment. Key Features: Engaging & Educational: Introduces mathematical concepts in a fun, interactive way. Premium Craftsmanship: Made from durable alder wood with precise laser engravings. Portable Design: Compact size makes it easy to carry and perform anywhere. Perfect Gift: Ideal for math enthusiasts, educators, and magic hobbyists. Made in the USA: Proudly crafted in our Hudson, Florida workshop. Watch the Trick in Action: Delight in the wonder of mathematics and magic with this timeless trick, sure to captivate audiences of all ages.