How to stay thaw short grease warmth for a sunshine or two? Any ideas? I only ran out of grease and probably wont...

Any ideas? I only ran out of grease and probably wont be getting a refill until today or tomorrow. Im wearing my sweater, slippers, and have coffee Im not cold. My sons are in their bed under their blankets right in a minute and they're warm. When they go and get up, any ideas for them to stay heat up? Surprising enough our subterranean vault is warmer than the crucial floor so Im staying down here!
Answers:    Hot showers? Putting the kids towels and blankets in the dryer. Boiling wet keeps the heavens warmer too.
Open up the oven and give it on. The heat will circulate.