Last year, I printed some coloring pages for Gracie.
Each one was like a miniature Advent calendar, divided into 24 sections, and she loved them.
If you have a preschooler or an older kid who really loves to color, you should consider coloring pages for Advent. You can get the ones we used, or you could make up your own, as long as it has 24 sections.
Here are our two favorites, linked to the pages where I found them so that you can go get your own.