- The lock may look simple, but it contains lots of mysteries.
- Easy to take apart and difficult to reassemble. Not only it can enhance your ability, and can even be an extraordinary plan.
- Suit for both children and adult.
- Use your brain, exercise your patience, is unable to untie the knot, but as long as the master of the structure, is sure to solve.
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*Due to high demand please allow up to 3-4 weeks for delivery. This Item ships from our international supplier.
