A few years ago I got a wooden table that someone was throwing out that works perfect as an extra project surface in the garage. It has solid wooden legs and frame as well as a large leaf that can be added in. It works great, but there are some things that do not fit under it.
I got a new oak entertainment center this morning that someone else was throwing out, and since the only space I have for it is under the table, I need to add leg extensions.
I used some scrap 2x4's, some 3" drywall screws, a 1 5/8" forstner bit, and some adjustable bench legs that I got from Rockler a while back (and some thin strips of cereal box) to raise the table without damaging the existing wooden legs.