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.
Cute little DIY memo board. The page is in another language but just looking at it I am thinking painted rocks for the birds and bug with a driftwood rest for them all, on a plain pine board with a cork sheet.picture for idea.