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