Lemonade stands

All the time. We have two to four yard sales ever summer, and they set up shop at everyone, offering iced tea as well, and sometimes cookies or other baked goods that they make themselves. We live three blocks froma school, and we homeschool. So they set up just before school lets out in the spring and fall on a very regular basis as well. ANd often on the really hot days during the summer, or days we notice a lot of neighbors out and about.