These can be had from Oriental Trading (OrientalTrading.com) for cheap. They
come in several sizes. The big ones, 2" (Item #IN-16/487), are $5/dozen. The
smallest ones, 1" (Item #IN-39/1532), are $8/gross. The small ones are great
for class. The kids just bend them over their fingertips and let them fly.
Go to www.orientaltrading.com and do a search for "poppers".
Daryl L Taylor, Fizzix Guy
Greenwich HS, CT
PAEMST '96
IEOTY '03
NASA Astrophysics Educator Ambassador
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-----Original Message-----
From: phys-l-bounces@carnot.physics.buffalo.edu
[mailto:phys-l-bounces@carnot.physics.buffalo.edu] On Behalf Of Anthony
Lapinski
Sent: Tuesday, February 27, 2007 4:48 PM
To: tap-l@lists.ncsu.edu; tap-l@lists.ncsu.edu;
phys-l@carnot.physics.buffalo.edu
Subject: [Phys-l] jumping disc
Years ago Edmunds sold a tiny metal curved disc in the shape of a small
shallow "bowl" (? 1.5 cm diameter). I believe you pushed it the other way,
held it to warm it up, placed it on a table, and it eventually snapped
back into place upon cooling and "jumped" off the table (similar to the
rubber "poppers" sold today, which look like half racquet balls).
Does anyone know if there is a new manufacturer for these discs, or where
I might find them in surplus?