Noah's Bright Chevrons

I decided to try a second patchwork duvet cover, this time for my son Noah.  He wanted bright colors, green to match his room and then yellow, orange, and blue.  I did the top in patchwork, quilted it with a layer of flannel (no batting), and then sewed that to a green sheet that matches his bedding for the bottom of the duvet cover.  I used a long green zipper to seal it up, to make washing a cinch, which is kind of ironic, because really how often do I wash it, so how significant would that extra minute or two of buttons be.