Rondo is a game that people can play together. It is like a special kind of tag game where one person, the Rondo, tries to catch the other people. But the catch is that they have to do it with a ball.
The game is played in a big space, like a park or a gymnasium. The Rondo stands in the middle of the space, while the other people stand around the edges. The Rondo has a ball and must try to hit the other people with it.
The people around the edges have to avoid being hit by the ball by moving and running around. If someone is hit by the ball, they must give the ball to the Rondo and join them in the middle. If the people around the edges manage to avoid being hit for a certain time, then they win and someone else gets to be the Rondo for the next round.
It's like playing a game of keep away but with a ball. The point is to avoid being caught so you do not end up in the middle trying to catch other people.