Build a simple electric circuit and a special switch that can be used to create an alarm to protect your room.

Mr. O’s “O Wow Moments” help you to become an scientist at home with hands-on, minds-on experiments and demos! Watch Mr. O every Saturday morning during the 7 a.m. news on Houston's KPRC Local 2 to see a new science demo you can try at home. Share your experiments with us on facebook and Instragram!

‍