The chimney is like a big tunnel above the fire, above the fireplace so the smoke can get out of the house. It's also coincidentally where Santa Claus gets into your house to leave the presents. He basically lands his sleigh on the roof of your house and then goes down the chimney. So you want to be like really magical to get down there. And somehow it's just don't have chimneys. But he gets them in there anyways.