We couldn't do December 17th yet. I will post when we can.
we bought $5 gift cards and wrote up a little note to leave on random cars in parking lots around town. we had so much fun watching the people come out to their cars and find the gift cards. the kids loved watching what the people do and how they look around trying to see if they can find who did this.
a couple people walked past and stopped to look and read the cards. after a father and son did it, we waited for them to go inside and then we put one on their car. they were very surprised to find it when they came back out.
we had a lot of fun.