Make homemade garland with the kiddos. Cranberries and popcorn on fishing line. They love it!
Decorate the house a completely different way. Buy new decorations if you have to in order to take the focus off the memories of past holiday with W/H.
Do something for a needy family. Donate gifts to a church or local organization. It really warms the heart and the kids learn importance of this as well.
Just switch things up and make it a holiday tradition for YOU!