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Learners observe different light sources, outdoors and indoors, using prism glasses (diffraction glasses) and color filters.

In this international citizen science activity, learners measure their night sky brightness and submit their observations into an online database.

In this activity (17th on the page), learners investigate why you cannot see colors in dim light.

Learners explore their surroundings while reasoning about categories and counting.

In this activity, learners explore a scale by comparing objects, which look similar but have different weights. Learners predict and then measure the weights of various objects using a scale.

In this activity, learners use clear nail polish to create a beautiful iridescent pattern on black paper. Learners discover that a thin film creates iridescent, rainbow colors.

In this activity, learners observe color mixing and absorbency using colored tissue paper and spray bottles.

In this "Sid the Science Kid" activity, learners set up a simple experiment to find out how sunscreen counteracts the effects of the sun.

This is a highly visual demonstration that illustrates both the effects of density and chemical reactions.