I was at the taco truck the other day getting an horchata, which is a Mexican rice beverage that tastes like rice pudding. The vendor handed three young girls their horchatas, and then started to make one for me. A moment later and I looked over to see them staring down at the ground where the youngest, a girl of about 5, had dropped hers. Another opportunity for kindness! The timing was perfect to show them that even perfect strangers care with nothing expected in return.
The vendor handed me the horchata, but when I turned to give it to her the girls were gone! Fortunately they were walking up the street a short distance away, so I ran after them and gave her the drink. And then went back and got one for myself because that stuff is delicious!