Here are a couple I have made using only squares. These are small quilts, as they were made for Quilts For Kids, but you could make them any size you wanted. Trip Around the World (the rainbow-colored quilt) was the design I chose for my first quilt some 30 years ago! The other quilt - the one with the puppy fabric - used a 6-1/2" square for the big block and four 3-1/2" squares for the four-patch. Really easy!