S.Y.
We've traveled to Europe twice with our 2.5 year old and the best advice I can give you is to be flexible! We weren't able to get too much done on arrival day or the day after because we just needed to catch up on sleep. But then after that, we had wonderful vacations! Our little boy easily adjusted after the initial change, and then was an angel, sightseeing, sleeping regularly, and having a wonderful time! We were so happy that we brought him with us, and I'm sure you will be too. Have a great trip!