We recently began learning about sound waves and vibration. We are currently experimenting with paper cup telephones to see how far our whispers can travel. Today, we successfully made our whisper voices travel 12 feet! We thought that was pretty impressive, but then we watched the video below and began to wonder how much longer we can get our voices to travel. Check out the cool video about people who made the longest tin cup phone ever. Maybe it will inspire you to try a similar experiment!