Glow in the dark bubbles - open glow sticks & pour them into bubble solution. Link says it's hard to see glowing bubble. but it's worth a shot since they were using a glowing bubble solution not a glow stick.
Make a festive feature of your Christmas place settings. Try wrapping napkins with twine rather than a napkin ring and finish with cinnamon sticks, sprigs or holly/rosemary or twigs spray painted gold or silver.