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