I love the Barbie blanket idea! I've never done a swatch (eek!) but then again, I really only knit blankets and scarves with a pair of socks thrown in here and there. I'm guessing you could seam up the sides of your swatch and make sachets, soap savers, or coin purses. This
project on Ravelry encompasses the general idea. Or maybe felt some of the swatches and used them as coasters!