Cut an octagon from your favorite hardwood. The interior angles at each outer point of the octagon should equal 135 degrees. The distance from one point to its opposite point across the octagon should be 3 to 4 feet.
Cut a 4-inch by 4-inch by 3-foot post. Attach the post to a 2-foot by 2-foot by 1-inch hardwood square using two 1/2-inch diameter, 4-inch long wood screws. This makes the base of your table.
Attach four 2-inch by 2-inch by 4 1/2-inch long wood strips in a square on the underside center of the octagon tabletop, to make a collar for the 4-inch by 4-inch post, using 1/2-inch diameter, 4-inch long wood screws.
Settle the collar over the post. Use two 1/2-inch diameter, 4-inch long wood screws to secure the collar to the post.
Use coarse, then medium, then fine and finally extra fine sandpaper to smooth the entire table. Apply several coats of clear acrylic wood treatment to seal the table.