One of the bonuses that come along with having children is that you learn to see the world through a child's eyes again. You've seen a thousand sunsets, but they haven't. Every new experience they have reminds you of experiencing the same thing for the first time yourself. You fall in love anew with the things that you'd long forgotten.
Children don't have concerns about social structures, or politics, or the state of the world. They're not worried about their next mortgage payment, or their job security. They're just growing, learning, and having fun. It's tempting to throw yourself back into that world yourself and just forget about all the baggage that comes along with being an adult. Unfortunately, you can't, but that doesn't mean it's not fun to sit with them and pretend that you can - even if it's just for a short while.