Energy Sticks and Circuits
Third grade physicists experimented with energy sticks to investigate simple circuits. The energy stick’s sensing circuit is so sensitive that it can detect even a very small amount of electricity that travels across your skin! I explained that a circuit is the flow of electrons in a closed circular path. We discovered which materials conduct electricity and how to open and close a circuit. These scientists concluded that metal objects, water, and playdoh were conductors. Salt is the conductor in playdoh. When each child placed a finger tip in a puddle of water on lab tables, the circuit was completed. This lesson provided the perfect opportunity to discuss the importance of keeping electrical appliances away from water. Click here and here to learn more about one of my very favorite science tools!
I also demonstrated this energy stick conductor.