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Globe at Night
Source Institutions
In this international citizen science activity, learners measure their night sky brightness and submit their observations into an online database.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-003-507.jpg?itok=2W_Fw-ML)
Exploring Structures: Butterfly
Source Institutions
In this activity, learners investigate how some butterfly wings get their color.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-004-294.png?itok=juOgmbpU)
Periscope
Source Institutions
In this optics activity, learners build a spy tool to secretly view things over walls or around corners.
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Safe in the Sun
Source Institutions
In this activity on page 13 of the PDF, use a special plastic card that has been painted with a chemical that changes color when it is in UV light.
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Eye Spy
Source Institutions
This fun activity uses simple materials such as milk cartons and mirrors to introduce the ideas of optics and visual perception.