Kallikantzaros

Okay, so imagine there is a group of creatures called kallikantzaroi. They are like little monsters that live underground all year long. But every Christmas, they come out to play for 12 days until the Feast of Epiphany in January.

Now, kallikantzaroi are very naughty creatures. They like to play pranks on people and cause all sorts of trouble. They might steal food, put out fires, or even tie people's shoelaces together.

But don't worry, there are ways to keep these pesky creatures at bay. People can leave sweets and bread out for them to eat, which some believe will distract them from playing pranks. Others might hang up an onion or a piece of garlic on their doorstep to ward off the kallikantzaroi.

So, that's the basic idea of kallikantzaroi. They're little monsters that come out during Christmas time to cause mischief, but people have ways of keeping them from causing too much trouble.