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