This is a mobile app for kids to learn how to calculate Vietnamese dong (Đồng Việt Nam; VND) in real life. It can count Vietnamese dong banknotes, and the user can move a finger to select the correct amount. There are also smileys and buttons that are larger and easier to press, so that it becomes easier for kids to answer.

The application has 3 modes: choice, input, and payment.

In choice mode, kids can choose the correct amount of money.

In input mode, they can input the number.

In payment mode, they can place the currency of the instructed amount of money on top of the tray.