These thematic pictures of zwierzęta are analogous to a visual dictionary. The theme "zwierzęta" 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 polish language that is not your native language.
To expand your polish language vocabulary on the "zwierzęta" topic, flashcards games are the best way: