Like all babies, my grandson is always coming up with new ways to make us laugh.His latest game is greeting all he meets with an extended fist to which one is expected to offer one's own set of knuckles to touch his like E.T. did with his fingertip.It is a lot of fun and he is not satisfied with "air knuckles".He wants contact! It is very boyish and "up to the minute" of cool. As if we needed another reason to enjoy him......