These thematic pictures of ធ្វើដំណើរ are analogous to a visual dictionary. The theme "ធ្វើដំណើរ" 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 "ធ្វើដំណើរ" topic, flashcards games are the best way: