While we were traveling before we stopped in TN, we would leave a rock with The LOTS Project and the website on it that we found at another location along our travels. We are amateur rock hounds so we would always be looking for cool stuff at each stop.
Our neighbor's daughter painted some rocks and is selling them at the farmers market.
#artstr #hustle 
Discussion
We always end up getting about half our optimum fuel mileage due to our car being loaded down with rocks collected by our kid.