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No need to be a quant or a physicist to enjoy any of these gifts featuring "Heisenberg's Uncertainty Principle - The standard deviation is 1/2 of H-bar where H-bar is the quantization of one cycle" with the query truism "How Certain Are You Of Anything In This Uncertain World?". Complete with detailed diagram of a cycle. Make others do a double-take with a dose of physics geek attitude with any of these unforgettable educational, scientific gifts today!