Einstein Lock Puzzle

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• The Einstein Collection Lock Puzzle - 3D Brain Puzzles by Professor Puzzle. • Contains a wooden puzzle lock with an attached metal key. • Develop your problem solving skills - Ca n you slide the locks pieces around and unlock the padlock • A perfect gift for any Physicist or Mind Puzzle enthusiast. • Part of Professor Puzzles range of Wooden 3D Brain Teaser Puzzles & Adults Brain Teasers. Show more