Sadness is an emotional pain associated with, or characterized by, feelings of disadvantage, loss, despair, grief, helplessness, disappointment and sorrow.
An individual experiencing sadness may become quiet or lethargic, and withdraw themselves from others.
Crying can be an indication of sadness.
Images for kids
A detail of the 1672 sculpture Entombment of Christ, showing Mary Magdalene crying
Sadness Facts for Kids. Kiddle Encyclopedia.