Just starting to plan...

We're going back next fall after ten years! This time our kids will be 14 (girl) and 8 (boy). The 8-year-old has never been, obvs. Any advice or recommendations about things to do? I'm sure a lot has changed in ten years.

Everything!

In all seriousness, I'd show your kids some maps and ask them what looks most interesting to them. Find out what characters they would like to meet. You may want to consider the Agent P adventures in the Epcot WS.

We just took my kids (DS8, DD5) for the first time and they loved the character meals. My son was excited to try all the thrill rides, and do Jedi Training.

I'd plan at least one day in each park. If you are staying longer, plan more days in each park, prioritizing MK first, then Epcot or AK, then DHS.

Go online with the kids and let them choose what they want to do in each park. If they are on the fence about a ride, YouTube videos of each ride, show, parade, everything you can imagine abound. When the time comes (60 days out if staying onsite, 30 days out if offsite), disboards has great resources on choosing which rides to schedule FP+ for. Definitely plan to stay for the nighttime shows, parades, fireworks in each park.

I'd also let the kids look at various places to dine and make recommendations. Character meals can still be fun at their age if they are interested. Places like Sci-Fi Drive In, Coral Reef Restaurant, Beaches and Cream, 50s Prime Time Cafe, Sanaa are all fun places to start the search for dining experiences. If you are staying for 4 or fewer days, I'd stick with dining in the parks to maximize park time. If staying longer, then you may have time to venture for some dining experiences at the resorts. We love HDDR, especially if someone is celebrating a birthday.

If your trip is longer, 7+ days, you may have some time for activities at the resort (listed on the resort's page on WDW website) if you're staying onsite, exploring Disney Springs and/or the Boardwalk, doing a water park, etc.

Enjoy!