My daughter will be with her Dad for Christmas Eve this year, and I will have her on Christmas day. Next year it will be reversed, and I’m really not looking forward to that.
I know several German-American families who all consider Christmas Eve the biggie, and that’s when they exchange gifts. You could look into that, go to Mass (or church; most have special family services). See what is already done on Christmas Eve that would make her Christmas extra special.