above^^^^ i think this is a good compromise letting them choose but allowing them to eat as they wish with friends or relatives. being vegetarian or vegan should be a choice I hope when I have kids that they have the same views as i do.
I grew up with vegetarian dad, stepmum and sister. I ate only vegetarian home cooked meals, was well educated on meat, milk, etc and where it all came from, and to never buy puppies and always adopt, composting, environmental awareness blah blah.
What I appreciate most was that my family NEVER pushed their beliefs on to me or tried to restrict me from making my own choices, especially outside the home at sleepovers, school canteen etc. If we were at a larger family gathering and I chose to eat meat, there was never any "No you aren't allowed", I was free to make my own choices, while my family maintained a vegitarian home, and then later in life I made the commitment to be 100% vegetarian entirely of my own volition.