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