This is the easiest DIY in the world, and possibly the most useful. You can wear this wrap as a scarf, shirt, vest, poncho, belted over a tank, probably even a dress. I haven't played with it long enough to discover all of it's uses, but I highly recommend that you make one.
First you need some cool fabric. Two yards of it.
Now that that is established, fold your fabric in half like a hamburger. Folded side should be on the left, as shown here.
Now, cute a slit through both layers of fabric, exactly where I placed my scissors in the above picture. The slit should be about 7 inches long and parallel to the folded side.
Now you have a wrap! It's pretty long, don't worry, I'll show you how to wear it shorter, it's long for the purpose of being an awesome scarf!!
To wear as a shorter vest or cardi, tie the long corners together and put the knot behind your neck.
It's a really fun layering piece!