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The Magic Cafe Forum Index » » Penny for your thoughts » » Human Abacus (0 Likes) Printer Friendly Version

George Hunter
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I have noticed a Human Abacus effect now being marketed—a stand, a set of vertical numbered Planks, with.a Pi book as part of the kit. I.have found no reviews. Is essentially the classic Mental Logs revised, or is it an advancement?

Thanks, George
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