In mathematics, the number system is the most widely used system for expressing and analyzing numerical data. It is the most important and essential part of every mathematical discussion and analysis. The number system is the most direct and natural way of expressing and communicating numerical data. It is the most useful and indispensable part of every mathematical discussion.

In this free educational game for children ages 4 to 7, the number system is the main topic. The application contains different kinds of exercises and activities for children to practice and improve their mathematical skills. There is also a quiz that helps them remember and learn numbers.