These thematic pictures of Природата are analogous to a visual dictionary. The theme "Природата" is split 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 that the information is absorbed better. This is especially true if you are using flashcards to learn bulgarian language that is not your native language.
To expand your bulgarian language vocabulary on the "Природата" topic, flashcards games are the best way: