Includes everything kids need to construct a secret code door alarm and set the alarm themselves! This fun and informational kit also includes two double-sided "Keep Out!" door hangers. Ages 8+ Package: 11"w x 8.5"h x 3"d Batteries: Two AAA, not included Book: 32 pages, full color Author: Paul Beck Case Pack: 6 Item #: D5022 UPC: 9 83450 90032 1

The book reveals the secrets of clandestine codes and cybersecurity! Kids learn all about code breakers, code words, complicated codes, code machines, famous codes, and computer codes.