The lock and key mechanism of this type of ATM piggy bank is carefully designed. The lock is usually made of durable metal that is resistant to tampering. The key is unique to the lock, ensuring that only the owner of the piggy bank can access the contents. This is especially important when the piggy bank is used in a shared environment, such as a household with children or in a classroom setting.

The ATM - style features of the piggy bank remain intact. It has a slot for depositing money, which can be used for both coins and bills. The design of the slot ensures that the money goes directly into the storage area without any risk of getting stuck. The piggy bank also has a display, which can show the current balance of the savings. This display is usually protected by a clear plastic cover to prevent damage.

When it comes to accessing the money, the lock and key are essential. The owner can open the piggy bank at their convenience, knowing that their savings are safe in the meantime. This feature also teaches responsibility, especially for younger users. They learn that their savings are valuable and need to be protected.

In addition, the piggy bank may have other security - related features. For example, some models may have an alarm system that is triggered if someone tries to force open the lock. This provides an extra level of protection against theft. The overall design of the ATM piggy bank with a lock and key combines the functionality of a traditional piggy bank with the security measures of a more advanced storage device, making it a great choice for those who value the safety of their savings.