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