Answer:
Package beneath a tree, inside a tasty treat. Keep it for a month, the taste is just as sweet. What am I?
I can be thin but not fat; in your body but never on your placemat. I'm always better when I'm fresh but you'll never see me in the flesh.
I am just two and two. I am hot. I am cold. I am the parent of numbers that cannot be told. I am a gift beyond measure a matter of course. I am given with pleasure when taken by force.
If you break me, I'll not stop working. If you can touch me, my work is done. What am I?
I'm blue at day and black at night. I do contain some creatures born and died. What am I?
No matter how little or how much you use me, you change me every month.