electromagnetic spectrum
Whispers in the Wind App
A game set in near-future Puerto Rico, where players help siblings Gabby and Raúl restore their town's communication systems after a hurricane
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![While sitting at a table, one child points a small transmitter at a vacuum-seal container that has a key finder inside, and another child holds a smartphone up to the other side of the container.](https://nisenet.org/sites/default/files/styles/curated_list_large_cropped/public/2023-03/ms2.jpg?h=d5227d54&itok=wYaMS_10)
Radio Explorers: Messages from Space
Learners investigate the differences between sound and radio waves in a partial vacuum.
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![An adult and a child holds a metal baking sheet above the antennae of a Wi-Fi router on a block of wood, placed on a table. Another child holds a shell of tinfoil around a block of wood placed apart from the first block.](https://nisenet.org/sites/default/files/styles/curated_list_large_cropped/public/2023-03/4_1.jpg?h=c2786100&itok=y1dmHbe5)
Radio Explorers: Wi-Fi Detective
Learners explore how to manipulate the radio waves from a Wi-Fi router using household materials and an app to measure Wi-Fi signal strength.
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![Two children are seated at a table spread with large cards that depict writing and various radio technologies. Both children are holding a card in each hand and smiling as they read the cards.](https://nisenet.org/sites/default/files/styles/curated_list_large_cropped/public/2023-03/radio_20221027_0208.jpg?h=1bbc7eca&itok=FL5FLjjs)
Radio Futures: You Decide
Learners discover how their own values and the values of other can shape the development and use of future radio technologies.
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![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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