This particular one was for a boy. Hence the airplane.
And I bet you are wondering how I got the super-cool, old-timey image on there. Well, I used this stuff:
I also added a little extra fabric detail. It's Alison Glass for Andover Fabrics, "feathers." The towel pictured above has a simple edge sewn on. On the others I added large vertical stripes of fabric and positioned them so that when you fold the towel in half and hang it, the embellishment would be visible. Just iron strips of fabric so that raw edges are hidden and topstitch onto the towel. The possibilities are endless.
My kind of project.