The POOF-Slinky 2023 Slinky Science Secret Messages Mini Lab will teach your child and a friend how to communicate to each other through secret messages and go on "missions" just like real spies. Cryptography is the procedure of making and using secret writing through codes or ciphers. Cryptography is no longer as simple as wrapping your message around a stick. Given sufficient resources, almost any code or cipher can be cracked. The Slinky Science Secret Messages kit explains how to create and discover cryptic messages, so you can communicate with your friends without others discovering your secrets. Through (18) different missions, your child will learn how to use invisible ink, The Caesar Cipher, Keyboard Cipher, Telephone Cipher, Cipher wheels, the Polybius Checkerboard, Braille, basic code breaking tools and more. The step-by-step instruction booklets make it easy to start and finish these activities. This Secret Messages Mini Lab is educational and will keep your child busy for hours of adventurous fun. This kit includes (2) tubes, (4) red caps, (2) markers, (4) crayons, red plastic, (2) fasteners, (8) cipher wheels, (2) cipher cards and (2) 48-page manuals. Some activities require common household items that are not included. This Slinky Science Mini Lab is experiment number 168 of a series of science kits that combine elements of learning with fun to provide hours of educational entertainment. The POOF-Slinky 2023 Slinky Science Secret Messages Mini Lab is recommended for children 8-years of age and older. POOF-Slinky, Inc. offers new exciting play with the highly successful Sno-Toys line, Fuzzoodles activity kits, as well as timeless classics, such as the original Slinky, Ideal table-top games, wood construction sets and over 400 other products.