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Rainbow Refraction
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In this activity, learners will explore how light can refract or break apart into different colors.
Convection Current
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In this activity, learners make their own heat waves in an aquarium.
Moiré Patterns
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In this activity about light and perception, learners create and observe moire patterns.
Pupil
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In this activity, learners explore their eye pupils and how they change.
Magic Wand
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In this activity about light and perception, learners create pictures in thin air.
Hot Spot
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In this activity, learners explore the invisible infrared radiation from an electric heater.
Corner Reflector
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In this optics/mathematics activity, learners use two hinged mirrors to create a kaleidoscope that shows multiple images of an object.
Rainbow in the Room
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This activity generates learner excitement about light through the creation of a room-sized rainbow.
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.
Pinhole Magnifier
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In this activity related to light and perception, learners use a pinhole in an index card as a magnifying glass to help their eye focus on a nearby object.
Polarized Sunglasses
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In this activity, learners explore how polarizing sunglasses can help diminish road glare.
Flashlight Play
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In this activity, young learners will explore light and darkness through flashlight play.
Seeing Your Blind Spot
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This activity (aka "snack") provides instructions for discovering your blind spot. It is an exploration of light and visual perception using simple materials you may have around the house.
Diffraction
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In this optics activity, demonstrate diffraction using a candle or a small bright flashlight bulb and a slide made with two pencils.
Mirrors and Images
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In this optics activity, learners explore how many objects they can see in a set of mirrors (hinged like a book) at various angles.
Dark Adaptation
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In this activity (6th on the page), learners investigate how photoreceptors in the eye (rods and cones) "adapt" to low light conditions.
Lagging Sound
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In this group activity, learners see and hear the speed of sound. A learner designated the "gonger" hits a gong, once every second, as the rest of the group watches and listens from a distance.
Bubble Tray
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In this activity, learners use simple materials to create giant bubbles.
Cylindrical Mirror
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In this activity, learners create a cylindrical mirror to see themselves as others see them.
Periscope
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In this optics activity, learners build a spy tool to secretly view things over walls or around corners.