Girls helping this young man to pour a full bucket of water on a boy's head.
The Easter season in Poland ends on Monday, when the traditional "Smigus-Dyngus" custom has place. The young people are pouring water on one another with lots of fun.
It is a very ancient Easter tradition. This day (Monday after Easter Sunday) is called also in Polish "Wet Monday" and it is a holiday, free of work day.