When Carmine Infantino took over the art styles in Batman in the early 1960's, he essentially redesigned the Bat-verse; the oval around the bat-symbol being the most obvious change on Batman, but from this communities POV the biggest change was that Dick Grayson was FINALLY allowed to age a little, from the perennially, pointy-banged 13 year old, to a young man of 15 or 16... And that necessitated a new look for him...
Recently, when browsing e-bay I came across a page of Carmine Infantino original art (alas, way outside my price range) and on the back was a positive plethora of Gryaon-iana, a host of doodles that Mr Infantino had done, obviously to help himself get a handle on what young Mr Grayson would look like.
The extremely emotive eyebrows are much in evidence (Very much an Infantino trademark), the still somewhat pixie-ish face that Dick has, and a variety of possible hairstyles too. Note that the one with the left hand parting (third from the right atthe top) would become his default hairstyle when he went off to college.
Fun isn't it? :)
Oh, and for added fun, a couple of panels of Gil Kane art from Detective Comics 390, also found on e-bay...
Yeah Dick, you really do add new context to term, "What a bummer", and the blissed out expression from the attractive gentleman whose head you're using for a vaulting horse suggests that he is THOROUGHLY enjoying the view! :)