Adoption in child's angle!

Students, of class one in a school, were discussing a student's family picture.
One little boy in the picture had a hair colour, different from the other family members.

One of the other students suggested that he was adopted.

A little girl said: 'I know all about adoption, bcoz I was adopted.'

'What does it mean to be adopted ?', asked another child.

'It means', said the girl, 'that you grew in your mommy's heart, instead of her tummy!'