Carve a tree into a bar and lay it sticking out into the water to make a jetty or a pier. Now you can walk out on the jetty and go further into the water without needing a boat or getting wet.
You made this jetty so it would be easier for Santa-san (さん) to dock his sleigh. Oh, you didn't know? His sleigh is more of a speed boat now, so he needs a jetty to give you presents, not a chimney anymore.