http://www.kosticks.com 30 colorful sticks magnetically connect to each other to symmetrically surround a hollow space. The video clips here are from June 6, 2010 at the World Science Festival Street Fair in NYC, where this puzzle was on loan to the Math Midway. The puzzle was designed by John Kostick and constructed by his wife Jane, whose work can be seen at http://www.jjkostick.com.
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