4M Science - Combination Lock
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Build this 4M multi-purpose combination lock and learn the mechanism behind it! Choose your own secret code to ensure that only you can unlock your treasures. It's also a coin bank and secret message holder! Makes a 6 x 12cm combination lock. Includes: a set of plastic lock mechanism, screw, metal shackle, sticker and detailed instructions. Age 6+ years. Part of the KidzLabs range. Distributed in New Zealand by Holdson.