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Bull frog callers. You need yogurt containers, string and scissors. Have the kids poke a hole in the bottom of the yogurt container. They'll need to do this by twisting the scissors rather than by smacking them because the container will just crack. (They can still be used if they're cracked, it'll just be harder to hold the string in place with a big knot.) Feed the string through the hole and knot it a bunch of times so that the string won't pull through the hole. Or use a paperclip. It doesn't matter which side of the hole the knot is on. Have the kids wet the string and then pull on it. The string should slide through their fingers and make a croaking sort of noise. Say to the kids, "You've made an unusual machine you can use for catching frogs. How could you change the pitch of the sound you make if you wanted to call bigger or smaller frogs?"
Don't forget tuning forks, corruga tubes.
And as a general note on sound workshops: have Tylenol nearby.
David Savory
Community Extensions Program Developer and Exhibit Curator
Science World British Columbia
TELUS World of Science
1455 Quebec Street
Vancouver, BC
Canada V6A 3Z7
t: 604.443.7561
f: 604.443.7434
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Science World British Columbia is a self-supporting non-profit organization which engages British Columbians in science and inspires future science and technology leadership throughout our province.
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-----Original Message-----
From: Informal Science Education Network [mailto:[log in to unmask]] On Behalf Of Jonah Cohen
Sent: Wednesday, August 12, 2009 2:21 PM
To: [log in to unmask]
Subject: Re: Sound and other Shows
ISEN-ASTC-L is a service of the Association of Science-Technology Centers Incorporated, a worldwide network of science museums and related institutions.
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Oh, there's some good ones with sound!
1) A resonating aluminum rod can be really loud, and is cheap/durable/easy. Usually marketed as the "singing rod" ie here:
http://sciencekit.com/singing-rod/p/IG0023754/ (Flinn Scientific even makes them in different lengths)
2) You can get a lot of volunteers to help you, and kids love the Boom Whackers
http://www.stevespanglerscience.com/product/1179
3) Ricci tubers (pipes with wire screen that's heated with a blow torch) are also cool. It's not online, but Flinn lists them in their catalogue as "singing tubes"
4) Wanna break the sound barrier? Just use a bullwhip. Takes a bit of practice, but makes you look macho.
Sounds of Science,
Jonah Cohen
Outreach & Public Programs Manager
The Children's Museum
"Discontent is the first necessity of progress."
-Thomas Edison
-----Original Message-----
Hello,
We are planning our new "show" for the upcoming school year. We were considering a show on Sound. If you have a fantastic Sound show, I would love to hear from you. Besides the Ruben's Tube, are there some other Wow-y, super cool demos, or is this a difficult one to make exciting?
If we don't go with Sound, I'd love some suggestions. We have Combustion, Liquid Nitrogen, Chemistry and Air. What are your favorite shows and demos?
Thanks in advance for any feedback!
--
Skoshi Wise
Director of Education
ScienceWorks Hands-On Museum
541.482.6767 ext. 26
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For information about the Association of Science-Technology Centers and the Informal Science Education Network please visit www.astc.org.
Check out the latest case studies and reviews on ExhibitFiles at www.exhibitfiles.org.
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