Answer:
I am lighter than air but a hundred people cannot lift me. Careful! I am fragile!
I go around a yard but do not move. What am I?
Draw fire or fill me; I'm still empty.
Deep, deep, do they go. Spreading out as they go. Never needing any air. They are sometimes as fine as hair.
You turn me over after you have traveled far. What am I?
What has hands but canβt clap?