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Spherical Reflections
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In this art meets science activity, learners pack silver, ball-shaped ornaments in a single layer in a box to create an array of spherical reflectors.

Three Circles of Pigments
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In this activity, learners overlap the three primary colors to see how all other colors are made.

Soda Can Mirrors
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In this activity, learners explore how pictures change in curved mirrors. Learners make cylindrical mirrors by wrapping Mylar around soda cans.

Exploring Materials: Thin Films
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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.

Rainbow Film
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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.

Rainbow Glasses
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In this activity, learners explore light, color and rainbows by making their own rainbow glasses.

Exploring Shadows
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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

Soap Bubble Shapes
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Learners explore three-dimensional geometric frames including cubes and tetrahedrons, as they create bubble wands with pipe cleaners and drinking straws.

Pinhole Viewer
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In this activity, learners discuss and investigate how cameras, telescopes, and their own eyes use light in similar ways.

Kaleid-o-mania
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In this hands-on activity, learners build their own kaleidoscopes and explore how light can reflect of off surfaces such as mirrors, to produce beautiful patterns.

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

Cardboard Opaque Projector
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In this activity, learners construct a projector out of cardboard to view their favorite images (such as storybook illustrations) on the wall.

Polarized Light Mosaic
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In this activity, learners use transparent tape and polarizing material to create and project beautifully colored patterns reminiscent of abstract or geometric stained glass windows--no glass required

Light is Made of Colors
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Learners observe different light sources, outdoors and indoors, using prism glasses (diffraction glasses) and color filters.

Cardboard Box Camera Obscura
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In this activity, learners construct a device that projects images onto a surface, so they can trace landscapes and other sights.

Exploring Materials: Nano Gold
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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.

Experimenting with Symmetry
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In this activity, learners use pattern blocks and mirrors to explore symmetry. Learners work in pairs and build mirror images of each other's designs.

Symmetry Fold-Overs
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In this math activity, learners experiment with the concept of symmetry.

Soap-Film Painting
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Make a big canvas of iridescent color with pvc pipe! In this Exploratorium Science Snack, you'll need to cut and assemble some PVC pipe, but the pay-off, the soap-bubble canvas, is big.

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