I found this great project while I was browsing the internet that I must try. Since I take so long to get fired up to do any projects lately, I thought I show you via the site I found it on matsutakeblog.
You need a basic unfinished dining table from Ikea for $69.
Just cut a few strips of 1x2 to make the sides. The base of the new side (that horizontal strip on the floor) is a 2x2. Join all the pieces of wood with dowels.
This method of joining wood doesn't require any special tools other than a drill, it makes a clean joint with no hardware sticking out, and the bond is extremely strong. (1) Drill a hole, (2) fill it with glue and stick a piece of dowel in it, (3) drill a hole in the other piece and fill it with glue, (4) push it into the dowel and connect. Wipe off the excess glue.