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The generic term is "slit drum." Start with a hollow log. Cut slits the top to make various tones. Found in indigenous cultures all over the world. The "Tone drum" that you gave the link for is a modern variation. I beleive they started showing up in the 70s, from a whole lot of makers. I have one in lovely mahogany, with all the tongues in the shape of whales. No maker label.


Flatfoot sez: Call me when 'Talent-in-a-Box' is ready to ship! -- [8{>

Got some tunes on You Tube:
http://www.youtube.com/user/flatfoot50
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My BiaB lesson site:
http://jdwolfe0.wixsite.com/learnbiab