Don't fill it all with new stuff. If you have things that are traditional to Christmas Eve in your house (assuming its' not "the Elves" that deliver it), add them in. Like the plastic plate with Santa on it, and plastic glass with a snowman, that are used for Santa's snack, the stocking, the hot water bottle with the festive cover, and the Christmas story that you always read on Christmas Eve night (it's Twas the night Before Christmas in our house). Those sorts of things.
In our house, new stuff for DD would be:
lush festive bath bomb
new PJs
hot chocolate
For DH, there is:
(possibly) a nice seasonal shower gel
new PJs
Christmas beer
nice hot choc
For me, there is:
lush bath bomb
new PJs
nice hot choc
It's been like that since DD was about 4/5, and she's now turning 13. And it has always come out just after dinner and after lighting the Christmas Candle, when we are already slowing things down, with the main aim of getting DD into and out of a bath, and off to bed. And persuading her that we will all be going to bed early in our new PJs.