Have you ever done something nice for someone else "just because"? It wasn’t to repay them or because you had to—it was simply because you wanted to. Well, then, you’ve done a random act of kindness!

Eeny, meeny, miny, mo, catch a tiger by the toe – so the rhyme goes. But even children know that counting-out rhymes like this are no help at making a truly random choice. Perhaps you remember when ...