These thematic pictures of унтлагын өрөө are analogous to a visual dictionary. The theme "унтлагын өрөө" splits into several parts. For children, especially toddlers from 1 to 5 years old, it is better to divide the sets of cards over several days, or even weeks, so the information is absorbed better. Especially it is true if you are using flashcards to learn the mongolian language, which is not your native language.
To expand your mongolian language vocabulary on the "унтлагын өрөө" topic, flashcards games are the best way: