We've admired tree-stump stools with painted tops before (see DIY: Garden Stools); we also like these side tables made from felled logs, with exteriors painted glossy white. Designer Marie-Laure Helmkampf came up with the idea for a project in Provence.
DIY Stump Turned Table for indoor or outdoor.(redheadcandecorate) Bug spray the heck out of it Dry for a week. Brush off dirt. Electric sand enough to get a fresh, clean look. Glossy polyurethane paint - many coats as you like!
Maybe just make a branch art piece without the paint? Build cheer and deck the halls with this fun-to-build DIY Branch Shelf. See instructions here. This DIY Branch Shelf is an easy way to decorate with nature and bring the outdoors in.