This is from one of my articles, and can be funny, but a little sad too:
On the evening of December 5th Mikulás (Saint Nicholas) visits the homes of good and bad children alike. He also wanders through the streets in search of little ones who might have escaped his attention. His customary traveling companions are an angel and a devil.
If you stroll through the historic districts of Prague during this time, you’ll be able to watch small children shrieking in terror while cowering behind their parents as the costumed devil(s) approach them.
The angles bestow gifts, while the devils punish the children who have misbehaved. It’s good fun for the adults playing the parts, and perhaps for some of the children, but quite a few Czechs have confessed that they found the experience thoroughly traumatizing when they were young.