I like the suggestion shopella had of a pillow block and a stayover with her gfs. Or teach them too. Another thought, how 'bout a disappearing 9-patch; sew the 9-patch then cut and rearrange the upper left and bottom right and makes a difficult looking pattern. I recently made a warm wishes but you need to be careful when you do the rail blocks, learned that by mistake. Needs design wall to get it correct. (for me that is)