Spy Labs: Invisible Tripwire Alarm

Create a secret alarm with Spy Labs Invisible Tripwire! Turn on the LED beams, line them up, and make an invisible barrier. If someone crosses it, the alarm sounds! The small transmitters fit anywhere and can be placed up to six feet apart. Setup is quick and easy with the included guide. For extra fun, use a fog machine to see the beams and catch sneaky spies! From Thames & Kosmos, for ages 8 and up