It is an old custom amongst Jewish children, to become war-like on the 'L'ag Beomer.' They arm themselves from head to foot with wooden swords, pop-guns and bows and arrows. They take food with them, and go off to wage war.
Other quotes by Sholom Aleichem
To go to the synagogue with one's father on the Passover eve - is there in the world a greater pleasure than that? What is it worth to be dressed in new clothes from head to foot, and to show off before one's friends? Then the prayers themselves - the first Festival evening prayer and blessing.