Answer:
I hatch without food
I am alive without breath and cold as death. I am never thirsty but always drinking. What am I?
Who makes it, has no need of it. Who buys it, has no use for it. Who uses it, can't see it. What is it?
You use me from your head to your toes. The more I work, the thinner I grow. What am I?
Until I am measured, I am not known. Yet, how you miss me when I have flown. What Am I?
I am a mini solar powered computer.