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