color
![Looking at an opal through a scanning electron microscope](https://nisenet.org/sites/default/files/styles/curated_list_large_cropped/public/images/catalog/8369/opal_sem_small_size.jpg?h=e39eea65&itok=5jTuJe0x)
Colors at the Nanoscale: Butterflies, Beetles and Opals
In this activity, learners will be exposed to the term ‘Photonic Crystals,' explore some of the well-known photonic crystals in nature and will also be able observe one method that scientists use in trying to replicate this process.
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![Large blue and orange interactive exhibit that features the properties of blue butterfly wings on the nanoscale. Exhibit has three boxes with preserved butterflies under a light and a large sign going into detail on nanostructures](https://nisenet.org/sites/default/files/styles/curated_list_large_cropped/public/images/catalog/1638/v2.0_changing_colors_1.jpg?h=a5b6522a&itok=AlkQ4DkI)
Changing Colors exhibit
An exhibit that was part of the Nanotechnology: What's the Big Deal? exhibition that shows how some high-tech nanomaterials mimic natural phenomena.
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![Three learners and a facilitator compare their dye colors to a PH scale](https://nisenet.org/sites/default/files/styles/curated_list_large_cropped/public/exsci_chem_20180219_1822_0.jpg?h=ecba4d93&itok=ZkdJmykM)
Nature of Dye
In this activity, learners create their own dyes and art while exploring how chemicals interact.
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![Group of learners examine color diffusion on various papers](https://nisenet.org/sites/default/files/styles/curated_list_large_cropped/public/exsci_chem_20180219_1688.jpg?h=265e640d&itok=MBn5G6FZ)
Chemistry is Colorful
In this activity, learners try to solve the mystery of which ink came from what marker by using colorful paper chromatography.
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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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![NISE Network logo in full color - blue](https://nisenet.org/sites/default/files/styles/curated_list_large/public/images/catalog/NISE_Network_national_logo_V%20largerfield.jpg?itok=7uhQGt68)
NISE Network logo - National Informal STEM Education Network
Promotional materials for the National Informal STEM Education Network including logos, colors, font, and specifications in multiple formats.
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Interference Acrylics: Painting with Structural Color
In this activity, learners explore structural color by comparing acrylic paint and interference acrylic paint
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![Closeup photo of Blue Morpho Butterfly](https://nisenet.org/sites/default/files/styles/curated_list_large_cropped/public/images/catalog/10473/screen_shot_2012-06-06_at_4.21.34_pm.png?h=9e7b4264&itok=Pu_kczbB)
Butterfly Blues video
In this O Wow Moments video, Mr. O talks about iridescence and Blue Morpho butterflies.
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![two children looking at Blue Morpho butterfly](https://nisenet.org/sites/default/files/styles/curated_list_large_cropped/public/images/catalog/8886/butterfly.jpg?h=aabaf923&itok=-SMZfUJN)
Exploring Structures - Butterfly
In this activity, learners investigate how butterfly wings get their color and that some wings get their color from the nanoscale structures on the wings instead of pigments.
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