Shopping security
Don't let anyone sneak into your room undetected! Build your own Intruder Alarm to keep out those pesky brothers & sisters! And while you are at it, explore how a magnet sets off this cool build-your-own intruder alarm.
It's a great project for exploring how a magnetic switch works in an electric circuit.
Simple construction of the alarm box is required.
Requires 2 x AAA batteries.
Ages 5 and over.
Ships within 48 hours · Estimated delivery Jun 30 - Jul 5
US$40
Get nowSign up to your membership to get coupons up to
15%
Get nowOpportunity to enjoy order discount up to 15% off
Top-Converting Item to Boost Your Average Order