It kind of depends on her style. Do you need something modern or more traditional? It's hard to suggest without knowing.
Some thoughts:
disappearing 9 patch with 3 of the colors and then sash the blocks with the 4th color
diamond rail fence
sampler quilt
Missouri Star Quilt Co. out of bounds quilt
http://www.youtube.com/watch?v=ljcmo...VFDHmDXqCIzuAw