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