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In this activity, learners discover that nanoparticles of gold can appear red, orange or even blue. They learn that a material can act differently when it’s nanometer-sized.

In this activity, learners create a colorful bookmark using a super thin layer of nail polish on water. Learners discover that a thin film creates iridescent, rainbow colors.

This activity guide features three related explorations to help learners ages 3-6 investigate shadows via the following science concepts: A shadow is made when an object blocks the light; you can chan

In this activity, learners will create an optical illusion top. Learners will explore color mixing, physics and design through this activity.

This is an activity exploring color and color mixing.

In this activity, learners explore color, light and shadow by creating their own puppets to hold in front of a light source.

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 explore light, color and rainbows by making their own rainbow glasses.

In this STEAM activity, learners create a "pixel tube" to explore reflections of light and color mixing.