This is just about the cutest idea I've seen in a long time. Cupcake Fondue, as seen on Pintsize Social by Amanda of Bake it Pretty. All you need is mini cupcakes (unfrosted), powdered sugar, a liquid (juice or milk), light corn syrup, and some dry toppings.
This would be a fun kids activity as well as a romantic Valentine's dessert idea. Check out the full recipe on Pintsize Social.