There's also a variety of kids' ages at these events, so the younger can learn from the older (and parents can easily intervene if this isn't going well). And y

There's also a variety of kids' ages at these events, so the younger can learn from the older (and parents can easily intervene if this isn't going well). And you know who your kids are interacting with: you know something about the families, or at least know someone who knows them, so the odds of malign influences are much lower.