My preschooler attends a local Montessori school. His particular school requires that he brings a cloth napkin in his lunch every day. I bought him some white napkins originally, but I recently decided they are a little boring. So, I decided to make a few napkins that have some character.
Pin your solid squares to your pattern squares, right side facing inward.
Sew a straight stitch around the perimeter, leaving a small opening at one corner. Unpin.
Flip inside out. Iron edges. Sew a seam around the perimeter, making sure to tuck in the seam where the opening was.