Idea for the kids on Christmas morning - crepe paper the door to their rooms . then they have to break out in the morning by busting through the crepe paper. Can also do for birthdays (decorate living area with balloons and crepe paper too).
How to Make DIY Christmas Ornaments with Your Kids
Footprint Reindeer- great idea for Christmas gifts or cards. A fun activity to do with the kids and then give for Christmas. I have never met a family member that didn't like something with the child's hand/foot prints.