EMS
![Two gallon-sized paint cans–one made out of clear plastic and the other metal– are side by side on a table. Behind them, two youths are seated at the table. Together they place a handheld, hand crank radio with a long antenna into the plastic paint can.](https://nisenet.org/sites/default/files/styles/curated_list_large_cropped/public/2023-03/radio_20221027_0937.jpg?h=350e2dc8&itok=_AfzhLVr)
Radio Explorers: Radio Silence
Learners compare and contrast how a variety of materials can block radio waves.
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![A family looks at an image through a blue filter](https://nisenet.org/sites/default/files/styles/curated_list_large_cropped/public/2022-02/ExSci_Space_20180929_1190_edit.jpg?h=3d346970&itok=-dNccHVd)
Exploring the Universe: Filtered Light
In this activity, learners discover how colored filters can help reveal more about an image and we can use light and filters to learn more about an object.
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