Did you know candy hearts produce a lovely pastel water color style paint?
Let candy hearts dissolve in water for about 15 minutes. Stir them around occasionally to help them mix into the water. Then let children paint the mixture onto paper. You may need to add more water to the hearts as they dry up. We also had some messy sensory fun by grabbing those little candies and rubbing them and our tinted fingers on the paper.
Once your paper is dry cut out hearts to make a Valentine's Day garland. Tuck the extra hearts into your Valentine mail or add to a heart themed craft table.