Heart shaped hand warmers for the cold Christmas days. Made out of whatever material you'd like, filled with rice or cherry pits. If it's cold, just microwave them for 30 seconds and put them in your pockets. When your hands are cold, you put them in your pockets which are now nice and warm!
DIY rice and lavendar eye pillows (freeze/refridgerate for puffy eyes or heat up to melt away headaches) -- This would also make great ice packs for your wee ones. My daughter has a sensory disorder and hates when we put ice cold packs on her owies - so this would be a great alternative!