I also happened across the book, Everyday Kindness by Stephanie Dowrick, and am enjoying reading it so far (uh oh, death knell for my liking the book if my history of book praising has anything to do with it).
Anyway, I would like to hang a big sign with the saying:
Sprinkle Kindness Like Confetti
outside my classroom, and I had the idea of the students creating little 3"x3" squares with ideas, you know, like confetti! Then I would pixelate using this alphabet:
Here is my handout that I will print on a variety of light colors of paper, and here are the first and second pages that the kids will get.