My daughter takes a block that she likes and enlarges it to be the size she wants. The quilt ends up being the one big block. And I think they turn out pretty darn good and I plan on making a couple as lap quilts for myself.
Barb
if you want something lightweight, why don't you make a sheet quilt. I don't know if that is the right technical word for it, but just layer muslin between the front and back? I know someone that just did the front and back without a center for a baby. It was lighter then a receiving blanket, but light enough to cover up with in the summer. But with added muslin in the middle you wouldn't be able to see the seams. Just a thought.