There wasn't anything paricular about them.
But together they decided that this was happiness.
“I walked over to the hill where we used to go and sled. There were a lot of little kids there. I watched them flying. Doing jumps and having races. And I thought that all those little kids are going to grow up someday. And all of those little kids are going to do the things that we do. And they will all kiss someone someday. But for now, sledding is enough. I think it would be great if sledding were always enough, but it isn't.”