Cathy's Crazy by Design blog. I tried to make them but got it all wrong and made the other quilt instead. So now I'm calling a do-over.
In any case, I cut four 2.5 by 4.5 rectangles of light fabric, and nine 2.5 inch squares of green. I sew two flip triangles on each of the light rectangles. Then I sew a partial seam as shown in the diagram. The partial seam allows me to take the next rectangle and sew a straight seam all the way across. Same for the next rectangle and the one after that. Then, last but not least, I finish sewing the partial seam. What fun!
Only 32 more blocks to go because the block finishes at six inches and the final baby quilt will be 36 inches square.