Kids can learn about the intricacies of security systems with the 4M buzz alarm money safe kit. It's both educational and fun, delivering enjoyable challenges while helping to develop handy skills. With this kit and included instructions, they can build and configure a digital lock to create a secure coin bank by learning how to wire a circuit and install an alarm buzzer for maximum security. Once they have finished, they can challenge friends to bypass the buzzer and crack the lock if they can. Details: Silver colored 9.5" x 2.5" x 8.5" assembled dimensions Digital lock Buzz alarm Instructions included For ages 8 years and up