4M Kidzlabs Spy Science Intruder Alarm Science Experiment Kit
Learn the science of connecting a circuit and build your own wire door alarm with the Kidz Labs Intruder Alarm Kit. Install this DIY alarm in your bedroom and stop those “unwanted intruders.” It comes with a transparent cyber-looking casing. The very cool spy gadget includes a plastic platform, accessories, metal pins, electric buzzer, cables, rope trigger and battery case. It works with two AAA batteries (not included). Recommended from 8 years.