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Build and configure a digital lock to create the most secure coin bank ever.
Learn how to wire a circuit and install an alarm buzzer for maximum security.
Challenge friends to bypass the buzzer and crack the lock if they can.
Detailed assembly instructions included.
Recommended for ages 8 years and up.
Challenge your child’s imagination with 4M toys and kits.
4M educational toys cover a wide range of educational subjects and include science kits, arts and crafts kits, robotics kits, and more.
4M offers a wide range of toys and kits to let you build a clock, crochet a placemat, or turn your room into a planetarium–all in the name of making learning fun.
Build your own super secure money safe
Learn about lock structure and connecting wire circuitry
Includes detailed instructions
Price effective as of Jun 25, 2025 04:26:38 UTC
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