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Stroboscope
Source Institutions
In this activity (posted on March 20, 2011), learners follow the steps to construct a stroboscope, a device that exploits the persistence of vision to make moving objects appear slow or stationary.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-004-149.jpg?itok=aVXlYvt5)
Breathing Blue
Source Institutions
In this activity, learners test exhaled breath for carbon dioxide and learn how to use an indicator as a simple way to measure pH.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-688.jpg?itok=cgEsPCBc)
Slide Whistle
Source Institutions
In this activity, learners build a slide whistle using PVC pipe, bamboo skewer, and piece of foam. Construction of the instrument is relatively simple.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-702.jpg?itok=rOcfJwnz)
Torsion Drum
Source Institutions
In this activity, learners build a musical drum using a cardboard tube, plastic wrap, and beads.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-004-256.jpg?itok=2GZwMD2Z)
Thumb Piano
Source Institutions
In this activity, learners explore sound by constructing a simple piano out of wood and craft sticks.