The 3 Hs are part of every morning in room 18. As I greet kids at the door, they have a choice of whether they want to give me a...
Most choose the hug, but sometimes there's a handshake or high five in the mix. (And there are usually a few kids who aren't really touchy feely, which I completely understand, so of course I don't force anything upon them.)
I've been doing this for so long that I don't even remember where I found the idea. All I know is that I can't take credit. :)