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In this activity, learners work in partners to create and exchange messages written in Braille. Learners use a Braille key and thumbtacks to write their messages in Braille.

free Ages 8 - 14 10 to 30 minutes
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Sound changes pitch relative to how you or the source of the sound is moving. Use this simple activity developed by the Exploratorium to experience the Doppler Effect yourself!

1 cent - $1 per student Ages 6 - 14 Under 5 minutes
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This activity includes several games about animal sounds. Using their sense of hearing and communicating with various kinds of noisemakers, learners role-play predator and prey.

$1 - $5 per group Ages 6 - 14 30 to 45 minutes
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In this activity, learners discover how sweating makes us feel cooler. Learners put on one damp sock and one dry sock and sit in front of a fan.

free Ages 4 - 14 5 to 10 minutes
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In this activity, learners use gelatin as a lens to investigate the properties of laser light.

$5 - $10 per student Ages 8 - 18 5 to 10 minutes
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Spin a short piece of PVC pipe that's been marked up, and watch a triangle appear. Enjoy this optical illusion from the Exploratorium's Science Snack series.

free Ages 4 - 18 5 to 10 minutes
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In this optics activity, learners use a shoebox, colored cellophane and sunlight to "change" the colors of gumballs. Learners will be surprised when the green and blue gumballs appear black!

$1 - $5 per student Ages 6 - 11 10 to 30 minutes
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In this activity, learners build a slide whistle using PVC pipe, bamboo skewer, and piece of foam. Construction of the instrument is relatively simple.

$1 - $5 per student Ages 6 - 18 10 to 30 minutes
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In this activity, learners investigate how geometry plays a role in perspective.

1 cent - $1 per group Ages 8 - 18 45 to 60 minutes
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This is an activity (located on page 3 of the PDF under Butterfly Wings Activity) about how visible light is affected by tiny nanoscale structures, producing iridescence on butterfly wings, soap bubbl

$10 - $20 per group Ages 8 - 14 1 to 2 hours
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In this interactive game, learners will test their memory of animal and insect sounds. Flip over cards, listen to the sound, and try to find the ones that match.

free Ages 4 - 14 5 to 10 minutes
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In this activity, learners investigate how bats use echolocation to navigate. One learner is assigned to be a bat, while the other learners are selected to be either moths or trees.

free Ages 6 - 14 10 to 30 minutes
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In this activity, learners trap a thin layer of air between two pieces of Plexiglas to produce rainbow-colored interference patterns.

$1 - $5 per student Ages 8 - 18 10 to 30 minutes
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In this activity, learners create a map showing the origins of spices and herbs from a favorite recipe(s). Learners first research the origins of the ingredients and then locate them on a world map.

$1 - $5 per student Ages 8 - 14 30 to 45 minutes
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In this activity, groups of four learners must complete a set of four manual tasks. The restrictions are that they must complete the tasks in a limited time while wearing garden or rubber gloves.

Over $20 per group Ages 8 - 14 10 to 30 minutes
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Make a one-string "guitar" by stringing a cup with some fishing line. You amplify the plucking of the string by placing a piezo contact microphone and mini battery powered amplifier inside the cup.

$5 - $10 per student Ages 6 - 18 1 to 2 hours
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In this activity, learners make a stroboscope--a spinning disk with slits around the edge that you look through.

1 cent - $1 per student Ages 8 - 14 10 to 30 minutes
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In this outdoor, sensory activity, learners role play as animals trying to identify their "family's" scent and locate their "territory." Learners mark their territories and sniff out other territories

$10 - $20 per group Ages 8 - 14 45 to 60 minutes
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In this activity (on page 2 of the PDF under GPS: Light and Color Activity), learners will see the illusion of colors produced by a rotating black and white image known as Benham’s Disk.

$1 - $5 per group Ages 8 - 14 45 to 60 minutes
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In this outdoor activity, learners work in pairs using their senses—especially touch—to learn more about individual trees.

$5 - $10 per group Ages 8 - 18 1 to 2 hours