We learned that we need to buy a ticket with a separate seat for a child of 1.5 g when boarding the bus. We did not receive a clear explanation of why the baby needs a separate place if he is riding in his mother's arms. The response from the female cashier was: "such a system! If someone does not come and there is an empty seat somewhere on the bus, then you will get on the flight." (that is, my husband and I cannot go with tickets if there are no empty seats!) I'll tell you about the site separately. To specify a child, you need to go to the baggage and animals section. That's the attitude towards people. Draw your own conclusions.