White painted stones by Natasha Newton - These would make a nifty place card. Just hand your guests a business card with a matching design on it. Then they get to match the card to the rock at their place. They could then take the rock home as a keepsake.
Moon Paintings: use salt to create texture on watercolor paintings. In this activity Salt and Glue are used to turn a simple watercolor painting into the surface of the moon! Add some black card silhouettes and you have a spooky Halloween picture.