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Assemble a double-security lock with a combination code and key to hide your most prized possessions. Then use the included buzzer and electronic components to build a really working door alarm or pressure plate to keep your valuables from prying eyes. With easy-to-find materials from home and our step-by-step instructions in the book, you'll find even more spy activities such as dusting for fingerprints, encrypting and decrypting codes, making diversion decoys, and more!

by Klutz
Original price $32.99 - Original price $32.99
Original price
$32.99
$32.99 - $32.99
Current price $32.99