Answer:
I am lighter than air but a hundred people cannot lift me. Careful! I am fragile!
found at the back of the book.
I sleep by day, I fly by night. I have no feathers to aid my flight. What am I?
I am a ship that can be made to ride the greatest waves. I am not built by objects, but built by minds. What am I?
I have an eye but cannot see. I take time to generate and can dissipate in seconds. What am I?
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?