feathers
![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.
Product
![Exploring Materials - Thin Films activity components including signs, activity materials and guides.](https://nisenet.org/sites/default/files/styles/curated_list_large_cropped/public/images/catalog/rainbow_film_kit_materials.jpg?h=7025d824&itok=xEHGGVVK)
Exploring Materials - Thin Films
In this activity, learners create a colorful bookmark using a super thin layer of nail polish on water.
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