Well, depending on what they are, especially at that size, some/many of those Christmas decoration types are not winter hardy around here.
If you want to keep it alive, you may be better off keeping it in a BRIGHT but cool location. This is the tricky part. Typical recommendations are unused room with vents closed/heat turned off, sun porch, etc. I've also tried windowless unheated garage with fluorescent light on timer. You need to water less if kept really cold (just above freezing/40's). if it IS a winter hardy variety, it CAN be wintered outdoors if you follow the Bonsai wintering technique, but that usualy involves initial gradual lowering temp (as in natural autumn weather) and some protective arrangement.
-- I have to admit that I have to be DEDICATED to successfully overwinter these marginal conifers. Very difficult in MY experience, but Others may disagree.
You may want to post some photos and see if anyone can ID -- You can try the Plant ID forum but you may have better luck with the Bonsai folks.