On the way back home from work I drove past two young girls sitting on a bench who were enthusiastically waving friendly to all cars passing by.

It seems most didn't see them, or decided to ignore them.

But I love being silly and friendly and thus gave them my best, friendly-enthusiastic waving possible while still driving a car, and they happily made "woho!" gestures and such when they saw that.

That made up most of the stress of my workday, seeing people happy, especially happy-silly children, is a great reward.