"KOLOSOK" is an international interactive nature competition for schoolchildren. Thousands of children from different schools compete in the online mode.

The application contains a lot of educational material and a great number of questions with answers. It is very easy to use and it has a lot of educational material and interactive games. It will help to develop children's interest in nature and improve their knowledge about the natural world.

The application is very simple, but it is very interactive, fun, and interesting. It is useful for children and adults alike.

The most important thing is that the application works without the Internet. It will not take up a lot of memory on your device.