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Build a musical ice theremin by programming a micro controller, like a Pico Cricket to respond to resistance generated by the ice melting, or the ice being touched.

Over $20 per group Ages 8 - adult 2 to 4 hours
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In this activity, learners create a traditional Mexican noisemaker (a matraca) using cardboard, craft sticks, and a wooden dowel.

$1 - $5 per student Ages 6 - 18 1 to 2 hours
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Sound can travel through a variety of media.

1 cent - $1 per student Ages 6 - 14 Under 5 minutes
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In this activity, learners explore electricity and conductivity to find that many things conduct electricity including copper, pencil lead, fruit, play-doh, and even people!

$1 - $5 per student Ages 8 - 18 30 to 45 minutes
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With a bit of PVC, a laser, a can/cup, and a small mirror, you can make a device that visualizes you voice or any sound transmitted into the cup/can.

free Ages 8 - adult 10 to 30 minutes
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In this activity, learners investigate sound and vibration by making a "bee hummer"--a toy that sounds like a swarm of buzzing bees when you spin it around.

1 cent - $1 per student Ages 8 - 14 10 to 30 minutes
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In this activity, learners explore sound by constructing their very own banjo out of a coffee can. Learners experiment with the canjo to change the instrument's pitch and timbre.

$1 - $5 per student Ages 6 - 18 45 to 60 minutes
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In this activity, learners create a hearing based memory game that they can share with friends.

1 cent - $1 per group Ages 4 - 14 10 to 30 minutes
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With a straw, two craft sticks, and some rubber bands, construct a noisemaker called a Sound Sandwich and explore how vibration produces sound.

1 cent - $1 per student Ages 8 - 14 10 to 30 minutes
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In this activity, learners explore how sound travels through solid objects better than through air. Leaners attach a metal clothes hanger to a piece of string and hold it to their ears.

$1 - $5 per student Ages 6 - 18 5 to 10 minutes
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In this activity, you'll use a straw, a water bottle and a paper tube to make an instrument that's very much like a saxophone.

1 cent - $1 per student Ages 8 - 14 10 to 30 minutes
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In this activity, learners construct wands that play different notes depending on information from light sensors programmed via a PICO Cricket.

$5 - $10 per student Ages 11 - 18 30 to 45 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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This activity (page 2 of the PDF under SciGirls Activity: Double Dutch) is a full inquiry investigation into whether hearing or seeing has a bigger effect on jump rope performance.

$5 - $10 per group Ages 8 - 14 1 to 2 hours
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In this activity/demo about piezoelectricity, learners discover how some crystals produce electricity when squeezed.

Over $20 per group Ages 4 - adult 10 to 30 minutes
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Learners build a simple electromagnet, then use this electromagnet to transform a yogurt container into a working speaker. They can connect their speaker to a radio and listen as it transmits sound.

$1 - $5 per group Ages 11 - 14 45 to 60 minutes
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This activity requires a Pico Cricket (tiny computer). Learners work on designing and building a sound sensor out of household materials, like plastic wrap and cardboard.

Over $20 per group Ages 8 - 18 2 to 4 hours
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In this activity, learners listen to songs and decode hidden messages based on the same principle as a modem. As a final challenge, learners decode the binary messages in a music video.

free Ages 6 - 18 30 to 45 minutes
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In this design challenge activity, learners build a four-stringed instrument that can play a tune.

$1 - $5 per student Ages 8 - 14 45 to 60 minutes
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Audio Boggle is an activity that lets you listen to a track (that you make yourself) and see what you can hear!

$5 - $10 per student Ages 8 - 18 2 to 4 hours