I've always really enjoyed the #LightTheWorld campaign, which puts the focus on service and helping others. This year it starts with a worldwide day of service on Dec 1, spends a week on serving the world, then a week on community, then family, then faith. It's an awesome way to get my kids involved in the Christmas spirit and thinking beyond themselves.
Here's a calendar download with activities/ideas (PDF): https://www.mormon.org/bc/content/assets/pdf/christmas2018/C...
And there will be videos will be coming out on http://www.lighttheworld.org, if it's the same as years past.
In general, I feel that if I can teach my kids to look for ways to serve and benefit others, then we're really getting at the core of why Christmas exists, and the core of who we are celebrating.