Calling all kids: Here's a new 21st-century rendition of the classic "string and two cans" telephone contraption. Modern 8" earphones amplify sounds and vibrations when the spring is stretched out-up to 10 feet! Kids can talk to someone around the corner or in another room. An engaging, active way to explore the principles of how sound travels. Includes information sheet. No batteries required. For ages 8 and up.
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