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.