For those of you who have lost a loved one, do you do anything special to honor them, during the holiday season?

We unexpectedly lost my dad over the summer. My family is pretty tight knit and DD was especially close with him. I'd really like to somehow incorporate his memory in our Christmas celebration, but am coming up short.

Anyone have a special tradition they'd like to share? Something toddler-friendly (DD is almost 2.5) that can easily grow with her. Religious elements are fine.