I had some colorful string around, so I decided to make some string art - here's how I did it, and what you'll need to make something similar!
*String (you can get colorful 'crochet thread' for cheap at WalMart - that's what I used)
*Small nails/tacks (I used 3/4" brads)
*Small mirror (optional)
Step 1: Concieve of It!
You'll want to draw out your design at full size. You can use a simple photo editor to do so, but I found it easier to do by hand at first. Make sure to specify where each nail will go.
I used a circle of nails within which I could make lots of cool circular-star patterns for the eye, parabolas for the fins and tail, a grid that narrows towards the back for the scales, and then some basic line art for the rest of it. Try to think of cool ways to incorporate the different designs the string can make. I bet a dragon could come out awesome!
Since I did mine in pencil first, I decided to take a picture of it (shown below) and use mspaint to help me visualize what it would look like with all of the strings attached. Once you're satisfied with your drawing, count up your dots or at least ensure that you've got enough nails.
Step 2: Prepare Your Backing
Since I was doing a fish, I decided that I wanted a sort of splash behind it. I drew a freehand splash pattern on the wood and cut it out with a jigsaw, then painted it using acrylics. If you put on a thin layer of acrylic paint, the grain of the wood shows through a bit and gives pretty cool watery effects. Whatever you do, be aware that you will be nailing dozens of tiny nails into it.
Step 3: Start Nailing!
Step 4: Rip Off the Paper!
Step 5: String It Up!
It's kind of like a coloring book version of connect the dots, except you can do it over as many times as you want until you're happy! Just pick the color you want, tie one end to a nail and start wrapping! You can make loops around each nail if you want, but in most cases you can just bend around them and everything will stay in place quite well as long as you tie it off reasonably tightly.
I tried to take advantage of the small amount of depth provided by the nails and layer parts - the fin, for example, was done after and above the body scales. I also did multiple layers of different patterns on the eye in an attempt to make it look rounder and more 3-dimensional. The right eye was also done low to suggest that it was behind the fish.
As a random touch, I stuck a small mirror inside of the fish's eye. It was a little square one I got in a packet at Walmart for cheap. I actually cut out a circle of masking tape, stuck it to the mirror, and painted blue acrylic around it. This resulted in a roughly circular patch of mirror whose edges blend in with the background.