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    The Exploratorium
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    In this quick optics activity, learners use a dim point of light (a disassembled Mini MagLite and dowel set-up) to cast a shadow of the blood supply in their retina onto the retina itself. This...

    $1 - $5 per student Ages 8 - 14 Under 5 minutes
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    The Exploratorium
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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.

    1 cent - $1 per student Ages 11 - 14 10 to 30 minutes
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    The Exploratorium
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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. Learners will also discover that because...

    1 cent - $1 per student Ages 6 - 14 10 to 30 minutes
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    The Exploratorium
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    Have you ever heard of a camera without a lens? In this activity, learners create a pinhole camera out of simple materials. They'll see the world in a whole new way: upside down and backwards!...

    $1 - $5 per student Ages 8 - 18 45 to 60 minutes
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    The Exploratorium
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    An ordinary camera has a lens that makes an image on film. In a pinhole camera, a small hole replaces the lens. This activity provides instructions for recycling a potato chip can to make your own...

    $1 - $5 per student Ages 6 - 18 10 to 30 minutes
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    The Exploratorium
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    In this activity, learners burn a peanut, which produces a flame that can be used to boil away water and count the calories contained in the peanut. Learners use a formula to calculate the calories...

    $5 - $10 per group Ages 11 - 18 10 to 30 minutes
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    The Exploratorium
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    In this activity about chemistry and electricity, learners form a battery by placing their hands onto plates of different metals. Learners detect the current by reading a DC microammeter attached...

    $5 - $10 per group Ages 6 - 14 10 to 30 minutes