Is free.
It costs nothing.
And it can cheer anyone up.
Walking home from placement today.
There was an oldish guy and his grandson, - I presume, he was about two.
And the kid tried to stop and pick up some mud laughing.
And the adult moved him on and the little kid give me a massive smile.
And then so did the adult.
And that really cheered me up.
It was lovely.
I'm going to try and smile to at least five strangers every day.