Ashura commemorates the death of Husayn ibn Ali. He refused to pledge his allegiance to Yazid ibn Mu'awiya, for which he was killed along with his 70 companions. This event is now a symbol of freedom and courage for Shia Muslims. During this 10-days holiday, every religious person wears black. They mourn, flagellate themselves, and take part in processions. Such specific circumstances seem more like a grown ups world, not a child.