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