Levitron Revolution EZ Float
http://www.tealco.net/levitron-revolution.html
or
http://www.aliexpress.com/store/product/POP-DISPLAY-Magnetic-levitation-floating-for-any-object-novel-promotion-dispaly/505530_457174813.html
http://www.amazon.com/dp/B003BWSW0E/?tag=gadge0fa6-20&creativeASIN=B003BWSW0E
http://www.aliexpress.com/store/product/Novelty-Gadget-Magnetic-levitation-rotating-pop-display-for-brand-promotion-souvenirs-gift/505530_443688629.html
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