We're pesco vegheads, as are the kids. At 4 and 5 now, we do give them the choice when we're out and about. Not at restaurants, but when we're at a casual potluck and a lot of stuff is right there, you know? So far, even in the face of overwhelming temptation (nonveg marshmallows), they've generally said they do not want to eat something with gelatin in it, much less something that actually looks like meat. We really haven't emphasized the "horrors" of carnivory. We've been very upfront about where all food comes from and how there are many, many different eating traditions both in our own circle of friends and family and around the world. At some point, I suspect they'll both try meat. They're pretty curious kids. But if they do, I'm going to push for them getting their meat from a friend's farm rather than a CAFO-package o' meat at the grocery store.