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