4M Spy Science Intruder Alarm Educational Toy
Learn the Science of connecting an electric circuit. Construct your own door buzzer and place it behind your door. Stop intruders from your room. It’s cool and fun! Construct your own intruder detector buzzer for your bedroom door and learn about connecting electric circuits in the process! Each kit contains a plastic platform and accessories, metal pegs, an electric buzzer, electric wire and string for the alarm.