Guests throw darts at balloons with paint inside. You keep the art. :) This is such a fun Idea. You choose the colors and the size to coordinate with your style - might be more enduring than having a fingerprint tree in your house forever.
Remember: Doing Nice Things for your family is just as good as for strangers. Don't tell them about it- just leave it for them to find. A sweet loving message or a thank you or an encouragement. Any kind word is good. The Art of the Surprise Note .
PS: I liked that the games doubled as entertainment and eye candy. Which game was the biggest hit? IC: I think it was the balloon dart board. The planner had to grab balloons from the ceremony to add to the board as replacements because the balloons