Great idea! I make quilts for a local organization - both on my own and through a guild - and just as you said, the demand for boys quilts is great. Perhaps because so many of the fabrics we choose are 'girly'? I'm starting to specialize in 'boys' quilts, partly because of the demand and partly because I have 4 grandsons and only one granddaughter.
When I use a little boy pattern/fabric, I try to make the back attractive for an older boy so that he and the quilt can grow up together. The pattern you created is quick and easy enough to use as either a top or the 'growing up' back! I also like that it uses only 3 fabrics...makes it much easier for my color challenged vision. Thanks!