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