Playground Quilt Tutorial
When I first saw this quilt, I started to think hexagon ruler or 60 degree ruler which lead to thinking this quilt has complicated blocks.
It turns out you use the 60 degree angle on a regular ruler. No special ruler needed. Even sweeter, is that the hexagon ring is stitched to each of the 12 blocks. No difficult angles to work with. Check out the Playground Quilt tutorial from Andy of a bright corner.