Build and configure a digital lock to create the most secure coin bank ever.</br>Learn how to wire a circuit and install an alarm buzzer for maximum security.</br>Challenge friends to bypass the buzzer and crack the lock if they can.</br>Detailed assembly instructions included.</br>Recommended for ages 8 years and up.</br>Challenge your child's imagination with 4M toys and kits.</br>4M educational toys cover a wide range of educational subjects and include science kits?? arts and crafts kits?? robotics kits?? and more.</br>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.</br>Build you