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In this design challenge activity, learners build a four-stringed instrument that can play a tune.

This activity (8th activity on the page) tests learners' ability to identify things using only the sense of hearing.

In this activity (4th on the page), learners conduct a series of tests to find out which of their ears is more dominant.

In this activity (11th activity on the page), learners use pennies to test their hearing acuity.

In this activity (last activity on the page), learners make a model of the eardrum (also called the "tympanic membrane") and see how sound travels through the air.

String Thing is an interactive online game in which learners change a virtual string's tension, length, and gauge to create different musical pitches.