I am not sure of your on hand resources, but it sounds like a great day for a cooking project! Yesterday I had six kids - ages 3 -10. We made chocolate covered marshmallows. It was a mess, but everyone could participate. (Marshmallows onsticks, put in freezer, dip frozen marshmallow in chocolate and decorate, we used sprinkles, and crushed oreos and graham crackers).
You could have them make play dough and then they can play with their creation.
Pizza - either large ones or individual. Stew or veggie soup might be another good idea.
Or going with a Christmas theme, they could string popcorn or make paper rings. Glitter something. Spray glue, pine cones and glitter kept my two happy for a few hours. Salt dough ornaments are easy and fun too.
HTH! Good luck!