Balloons with photos of memories tied to the bottom is a sentimental and thoughtful proposal idea. Let her pop all of the balloons to find the ring. You can fill the rest of the balloons with sweets, glitter or flowers.
Display many photos with an old frame, wire, and clothespins. PERFECT use for the huge frame I just took apart for the girls hair bow holder! (instead use coloring for clothespins and frame! Glitta it up)