Use old pool cues as table legs. Measure the length of legs you will need. Cut the pool cues to that length, making sure that the thicker end (or handle) of the cue is closest to your table. Screw the cue stick segments into small wooden squares, then attach the squares to the bottom of the table.
Measure the length of the leg you need for your table. Buy attractive used books that will stack to exactly that height. Use a hole saw to drill through the center of each book. Glue the book covers together with a strong adhesive. Put a steel rod through the stack of books and attach to the table top. Repeat three more times.
For a young girl's desk, use pink leg warmers on each leg for a ballerina-themed room. For a budding sportsman, use athletic socks. Not only will you have a distinctive look to your furniture's legs, the socks will help protect the floor---particularly important if the floor is wood.