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.
Neat idea for a kid's birthday party, tie balloons to favor bags. They will be festive party decor, plus every kid wants to take home a balloon! maybe that way I don't forget to give the favors tobtge kids!