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Build a double security lock with combination, code, and key for personalized protection
Create a door or pressure plate alarm to safeguard valuables from intruders
Includes 32-page activity book with coding activities and DIY security measures
Teaches the science of making and breaking codes, secret messages, and fingerprinting
Easy-to-follow instructions and all materials included for immediate assembly
Summarized by Shop
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, yo