Answer:
I row quickly with four oars, but never come out from under my own roof. What am I?
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. What am I?
I can be 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. What am I?
People need me, yet they give me away every day. What am I?
I am lighter than air, but a hundred people cannot lift me. Careful, I am fragile. What am I?
Break me and I am better immediately set and harder to be broken again.