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PIRA Code(s)
3A20.80
Set up time
1 minute
Physics and Science Concepts
Oscillations and Waves
Operation
Shake the cup to send large waves down the spring and create sounds similar to whale songs or star trek laser blasts. Speak into the cup and the spring will create an echoing effect.
Safety
Do not hyperextend slinky.

Large plastic cups attached by a metal coil allow waves to be heard.