I just finished making a tie for Baby Bunny. It took about an hour but I imagine the next ones will be even faster now that I know what I'm doing.
It velcros in the back. (It has two pieces--the actual tie part and the neck band part....) Cheating, I know but it works pretty well and makes it so I won't have to re-tie it every Sunday. And I might have to adjust the length when my handsome baby is actually here. :)
P.S. I bought the white shirt and pants. There is NO way I would make a collared baby shirt--that would be a nightmare.