DS didn't transition his grade skip mid-year. In fact, he didn't realize he skipped at all. He thought he was being held back. LOL
Background: Small private school for K5. The teacher had K5 and 1st in one classroom, so she gave DS first grade work when he was in K5. The fit was horrible and we pulled him mid-year to homeschool. Took 4 weeks to cover 2nd grade and we got scared enough to hire a private tutor who did 3rd grade in a couple of months and then started 4th. When school started in the fall and they accepted him into 2nd, he thought he had done something wrong....
Anyway - he realizes he is a year younger than the other kids, but has never really caught on why, I think. So much for being smart, huh?
As for the discussion of birthday parties.... we did that for each kid one year on their request. The deal was, the party was their present - no other presents from Mom and Dad. (Although they got other presents from the guests, they weren't as appropriate or enjoyable as Mom and Dad would have gotten them.)
Last year, we opted for family trips to celebrate birthdays. The kids enjoyed that more than school friend parties.
Who knows what this year will bring....
Mary