To join, you buy a special fabric pack from Cherrywood Fabrics based on the ROYGBIV rainbow. Each month a new inspiration block is announced, and you use one of the fabrics from the bundle, as well as any other fabrics you choose, to make a 20" x 20" quilt. You can use whatever fabrics you'd like, but the quilt should read as whatever your Cherrywood fabric choice is.
May's inspiration block is the Monkey Wrench block. It's an old block that has been around a while and is known by many names. I'm calling my quilt, "Monkey Green, Monkey Do." The tiny Monkey Wrench in the middle is embroidered with perle cotton (it's what I happened to have). The square it's in is only one inch by one inch! I also tried matchstick quilting for the first time. Tedious, to be sure, but it was a small quilt and I love the effect.