These thematic pictures of Боје и облици are analogous to a visual dictionary. The theme "Боје и облици" 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 serbian(cyrillic) language that is not your native language.
To expand your serbian(cyrillic) language vocabulary on the "Боје и облици" topic, flashcards games are the best way: