Now this is a fantastic idea! Check out this Giant Valentine's Heart Tutorial. Simply fill your handmade Valentine heart with all kinds of goodies that your recipient will love. Craft lovers will be delighted with this kind of heart, with each of the coffee filters filled with all sorts of craft items - be it yarn, fat quarters, glitter and scrapbooking supplies, paint, etc.
If you have kids, you could also fill the giant heart with the kinds of things they like. I wish I would've thought of this idea for my son when he was little. Can you imagine the look on a boy's face when he opens up a giant heart like this, and it's filled with toy cars!?! Squeeeeeeeeeeee!