Spy Science - Intruder Alarm
Contains plastic platform and alarm casing, 1 set of plastic accessories, metal pegs, electric buzzer, electric wire, string for alarm trigger, and detailed instructions. 2 x AA batteries required (not included).
Discover the fun and learn how to connect your own electric circuit! Construct your own door buzzer and place it behind your door. Learn how to alert and stop intruders coming into your room with easy and interesting science fun! !