No. 3 : Mummy, what is chao fan?
I : What is fan?
No. 3 : Rice.
I : What is chao?
No. 3 : Grass.
I : Grass rice? No! It's fried!
No. 3 : Oh, fried rice.
The hanyu pinyin for fried and grass is almost the same. Fried is chao, grass is cao. But both sound the same.