Maybe not a performance but you could take old photos and make a movie out of them. Google to find a company who does this in your area. You just give them your photos, they make a slide show movie adding music if you want. ... View related article.
Balloons are inexpensive and always add a festive feel. You can decorate with paper. Make paper chains, paper mobiles to fit your theme, hang mobiles like snowflakes from the ceiling. ... View related article.
