If you don't want to hand stamp your white strips, you could just cut out some pattern paper and then sew it onto your cards. I cut my ribbon into 2 inch strips and then folded them in half, that way I had enough ribbon to catch it with my sewing line, so it wouldn't pull out. Put a little adhesive on the back of the white paper strip before sewing, this keeps it from sliding around on you. I also put some adhesive on the ribbon tag to keep it in place.I just sewed my zig zag down one side and then the other. I did all the sewing at one time.
Have fun! Go spread some love to some moms you know! They deserve it! They'll love you for it!
psst....There are some more great cards over at Kelli's House...check them out.