Linda, I plan to make a quilt with the blocks from this 30s theme swap. I bought more 30s type fabric so I could make more blocks for myself--- to have more than only the ones I'll get from this swap. Since it's only 8" finished, I'll need a lot more blocks than the sets from one swap! If you want to mix themes and use different themed blocks together in one projects you can. One of the beauties of quilting is there aren't rules and you can create your projects however you want. :-)