35 үсэг is an educational application developed by Mongol Content, designed for children in primary school, especially for those in the first or second grade. The app consists of 35 interactive games, each game focusing on a different letter of the Mongolian alphabet.

The games are designed to help children learn the basics of the Mongolian language, including the sounds and shapes of the letters. The app also includes a feature that allows children to practice writing the letters with their fingers, making it an excellent resource for both visual and kinesthetic learners. Overall, 35 үсэг is a fun and engaging way for children to learn the fundamentals of the Mongolian language.