A person in their twenties playing a teenager is one thing, but isn't Dick Grayson like 10 or something when he first becomes Robin. I know they'd probably change that to make him older, but then it doesn't give him much time before his parents are killed. I would imagine the best thing they could do his have him start at 10-12 and not become Robin until somewhere in his teen years.
However, irrelevant since the whole idea is bad to begin with. Who really wants to see The Graysons doing acrobatics and what else? Would they be using their acrobatics to stop criminals who always conveniently run into their show at just the right time? Would people keep telling Dick that he has a great destiny as a wink to the audience? Would anyone care?
