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Isis Adventure Puzzle Ball by from Gadgetshop.com
When your cerebral cortexes need stretching: use this. Said to be the most difficult puzzle ever, the ISIS is an alloy ball covered in a unique hieroglyphic code. The key inside it opens one of several ISIS golden pyramids hidden throughout the UK. Each pyramid contains a gold coin worth £500 and silver coins worth £20 each.
Category: Games, Puzzles & Learning £109.99