I bought this gorgeous Outlines stamp a few years ago and have been meaning to make a Valentine's Day card with it, hope you like it! Stamp: outlinesrubberstamp.com #H700. Used the 'gift card slot idea' to create a 'ditch' which holds acetate strips with hearts adhered to tips. I was going for a floating heart look when the card is untied and opened.
Definitely have to use sticky strip to hold the 'ditch' together!!