Children laughed, joy filling their hearts and the air.

Meaning: This sentence is describing the happiness of the children, whose laughter filled their hearts and the air, creating a joyful atmosphere.

Choice of Words: Children are young people. Laughed means that the children were making a happy sound. Joy is a feeling of great happiness. Filling their hearts and the air means that the children's happiness was so great that it filled their hearts and the air around them.

Alternative Expressions

Related Expressions