I've often wondered this while in public:
How do I prove my kids are mine?
My kids do not carry ID on them and I don't carry ID for them - not picture ID at any rate. My kids don't look like me - not really. Especially the boy. Just this Saturday, I was asked 'And whose children are these?' I was in the Green Room at church, after hours, alone with my kids. Lady, they are mine. I imagine I could carry a family photo in my wallet, but when I'm going to the playground, it's the cell phone, keys and maybe a few dollars.
Today, J was out with Mini Me at a McDonald's Playland. Mini Me didn't want to leave and began screaming and crying: "No! I don't want to go!" People stopped and were staring. She was fighting against leaving with J. He modified his planned departure to casually refill his drink - to show he wasn't rushing out with someone's kid. Mini Me was in rare form. She stood against the wall and wouldn't go to him.
When they got home, J asked Mini Me who he was. Her response? "Bad Guy." So we can't even depend on our kids to tell people we are their parents. Nice.