Okay, so imagine a long, long time ago, before your grandparents or even great-grandparents were born. People lived in a place called Finland. It was a very cold and snowy place, but also very beautiful with lots of forests and lakes.
These people had special stories that they would tell each other about things that they couldn't explain or understand. These stories were called folklore. Some of the stories were scary, some were funny, and some were just plain weird!
One of the most popular characters in Finnish folklore is called the 'tonttu'. It's kind of like a tiny elf that helps people around the house. They're often depicted wearing a little red hat and living in the attic or barn. People would leave food out for them as a way of saying thank you for their help.
Another popular character is the 'metsänpeitto', which means 'forest cover'. It's a magical spell that causes people to lose their way in the forest. According to the stories, it's caused by a wily forest spirit who likes to play tricks on people.
There are lots of other characters in Finnish folklore too, like the 'joulupukki' (Santa Claus), the 'Hiisi' (a mischievous spirit), and the 'lännen noita' (western witch). Each of them has their own stories and legends.
Even today, Finnish people still tell these stories to their children and grandchildren. They are an important part of the culture and history of Finland, and a way of passing down traditions from generation to generation.