So lovely! The gray background fabric is just perfect. I am working on a stack and whack right now too. The fabric is Everglades National Park. There are gators, turtles, manatees, flamingoes, egrets and herons, as well as tropical skies and foliage. It's making up into some interesting blocks, each one a surprise. It's also a treat to work with pretty spring like colors when old man winter is with us. That's why I enjoy stack and whack so much, each block is a mini mystery! Your neice will love her new quilt, it's a work of art!