무한숫자 - 9단

It is a game to touch as quickly as possible in the order of 9,18,27 within 30 seconds.

It requires a high degree of concentration and quickness, and it is also very helpful for brain activity.

It can be used as a fun and competitive learning tool if you want to teach parents and children how to use their fast brains.

Killing time can be done in just 30 seconds, so anyone can use it easily and simply.