I picked up a simple frame that had a whitewashed look at IKEA. It was about $3.00.
I slipped a piece of burlap in front of a sea green piece of decorative scrap book paper so you could see the bluish tint of color through the burlap. The matte framed it nicely. Then I cut some ribbon to fit the frame and glued it down.
Next I found a shell that had a hole and looped some light weight sheer ribbon to hang over the glass. The backing on the frame secured it. If our friends find a sand dollar or a special shell some day they can always change it out! It was a fun craft and helped me tell my friend, "See you later", not "Goodbye". : )