I have to confess that when I volunteered to fly to Poland with Kris and the kids (due to the fact that Sterling was going over a bit earlier, and I thought it would be too hard for Kris to do on her own), I was a bit apprehensive about traveling with a five year old and a two year old. I hate those long distance flights myself (especially in coach), so I couldn't imagine how in the world Atti and Zoe would cope with it.
It turns out that they handled the long flight from SLC to Paris pretty darned well. The rest of the trip ... let's just say everyone ended up being pretty stressed and sleep deprived.
First, let me offer a tip for anyone flying with young children, car seats, a stroller and nine suitcases to an international location: curbside check-in is absolutely the only sane way to do it. For the price of a tip (per bag), you unload your vehicle (in our case, the big SUV of Sterling's brother Andrew, who was a god-send), and give it all over immediately to the sky caps. They also print your boarding passes, so you can proceed straight to the security line. Getting through the security line with two little kids, three carryon suitcases, a backpack, a tote and a suitcase was probably the worst thing about traveling with young ones.
Once aboard the plane, we lucked out and got an extra seat along with our four. This enabled Atti and Zoe to be able to stretch out and sleep for a bit. As for me, I never can sleep on those long overnight flights anyway (even with chemical help), so I watched a few movies. One was "Everest." All I can say is that if I EVER profess a desire to climb Mt. Everest, I sincerely hope someone will prove their devotion to me and slap me up the side of the head. Spoiler alert: a good number of the climbers ended up dying. Those who didn't lost significant parts of their bodies.
We arrived in Paris at about 10:30 in the morning, and our flight to Warsaw wasn't until 7:30 p.m., so we thought we could make our way into the city and see
something of Paris. Note: if you have two small kids who are sleep-deprived and grumpy, all fore-mentioned carryon bags and stroller, please do yourself a favor and don't think you have enough time to go into Paris, even if you do have an eight hour layover. If it's also raining, your chances of completing this in any kind of happy or even a half-way sane way is pretty much cut in half. If you're dealing with the Charles de Gaulle airport, it's essentially zero. The only way to do this is to NOT take the train, but rather to get a taxi and save yourself a great deal of walking and headaches.

If you decide to go ahead with the madness of going into the city by train, you should first leave absolutely everything possible at the Bagages du Monde, located across from the Sheraton at the airport. It will cost 7 Euro per bag, and you need to have all items you want from the bags out and all items you want to leave in the bags in (they will not accept loose items) before you even approach the clerk. And no, they will not be sympathetic just because you have crying babies.
The next thing to be aware of is that the train ticket kiosk and the vending machines in that area will not accept paper Euros. You must use either coins or a credit card. If you don't place the train ticket into the turn-styles in exactly the right way, it will invalidate the ticket. So look at the ticket carefully and feed it in the right way, and so what if there's a crush of impatient people behind you?

Our goal - and one we thought was quite modest - was simply to visit ONE site (the Notre Dame), and have a nice lunch. We did accomplish having a nice lunch. It's one of the things I love best about traveling - to wander among little cafes and choose one based on nothing really. Maybe you think it's cute, or one of the menu board items sounds good (if you can understand what you're reading), or someone dining outside is eating something that looks great. I have very rarely been disappointed by choosing this way and ordering as simply as possible. We all shared a mozzarella salad, bread and French onion soup, and it was just right.
Walking with two increasingly tired and grumpy kids and trying to find Notre Dame - not so successful. When it started to pour, we gave up and called for an Uber ride back to the airport.
If that had been the end of our Paris story, it would have been a mildly frustrating and eventually funny story. However, the worst was yet to come.
The Charles De Gaulle airport, part 2.
I have flown into CDG several times and I feel that I've given it every chance. I truly do. But with the exception of my first trip to Paris (because someone was totally taking care of every detail), I have yet to have a positive experience there. One of my favorite stories: I was connecting through CDG with an extremely short connecting time (lesson learned). The flight attendants were very solicitous about the situation and brought me to the front of the plane so that I could get off first. I thought, great! They are really going to handle this! And I WAS the first one off the plane. They put me on a shuttle ... where we proceeded to wait for all the other passengers to disembark. And I was at the back of the shuttle since I was the first one on, so that when we at last reached the terminal, I was among the last people to get off.
Anyway, enough about CDG, except to say that almost everyone we dealt with was rude and/or condescending. There were several more instances, but basically they all boiled down to that. I hope one day to have a positive experience there, for I love Paris too much to not go back. Maybe I should go by train next time.
The rest of our trip to Warsaw was pretty uneventful, other than the fact that our carry-ons ended up scattered throughout the airplane, so Atti and I ended up being the very last ones off.
One of the best things about the journey was that by the time we arrived at the Parker's "flat" in Warsaw, it was time to go to bed. I usually adjust to time zone changes fairly easily, and I believe that partly it's because I have one hard-and-fast rule: always get yourself on the local schedule as soon as possible. Often flights from the US arrive at the final European destination in the morning, and after a long often sleepless night, people are severely tempted to take a nap right away. Don't do it! Do whatever you have to do to stay awake until it's bedtime in your new location.
At any rate, we all arrived in one piece. Traveling with small children is definitely a challenge, but it's doable.