At less than three years old, there's no way my granddaughter understood concepts like the value of culture. Sitting with her on the living room carpet, I would first show her a picture, then the Chinese character on the back of the card.
不到三歲的稚齡孫女絕不明白大道理，和她坐在客廳地毯上，每次先看圖片，再教背面單字。