Ask for information about goblins or fairies that Harry Porterie likes to decorate.

You mean goblins. They don't want to stay there. they

Fred hung it on the Christmas tree.

Or fairies. They are very nice. Magic can be used, but the Ministry of Magic has no right to bring them wands, and they are not smart, so they are classified as animals.

Look at the book Fantastic Beasts and Where to Find Them. Publishing (People's Literature Publishing House)