The story like this: one day when her granddoughter, six years old, visited her and on playing drawing. In purposed to my sister-in-law made her granddoughter enjoy, she drew her husband suntaning blacked with murmuring "makkro kuro kuro no kuronbo no kuro" in a tone insulting a little: kuro means black in Japanese and makkuro means pitch black: his skin color is rather black as a Japanese.
 

Then the graunddaughter heard her grandmother said so and told her  not to say like that about her grandfather,  because he worked so hard for themselves every day, so he got suntan and his skin became black.
 

How cute she is! Can you believe that? The six-year-old girl said so!
 

She could already consider things through. 
 

From this story I got cerain that chidren listen carefuly what adults say and they can understand that. 
 

How woderful human sensivity is!  What a wonderful capercity we human beings have, you should be re-recognized once again!