Can we make a list of christmassy activities to do with kids that are free to do? I'll start 
-Curl up under blankets with hot choc and treats and watch Christmas movies
-Doing Christmas crafts, making decorations
-Going for a drive or walk at night in town to see the Christmas lights
-Trawling the local DIY stores at quiet times to see their Christmas displays
-Listening and dancing around the house to Christmas music (maybe a bit early for this yet)
-Going for a walk in the crisp winter weather
-Baking Christmas themed treats
-Putting up decorataions