I just filled snack-size baggies with cheap candy and stapled the decorated top on. It's just a cardstock rectangle (6 3/4" x 4") folded in half and decorated with stickers. Too easy and really inexpensive. If you do this for someone besides little short people that will immediately rip it open and devour what's inside, you might take a little more time and staple, then decorate so your staples are covered.
And, finally, a picture of what my short person #2 did while I blogged the other day.
At least the kid can draw a balloon. On my floor. Good thing it's only linoleum. When the cat's away...
Have a lovely Heart Day! Eat something bad.