Answer:
I am lighter than air but a hundred people cannot lift me. Careful! I am fragile!
I am cracked by Indiana Jones.
I'm blue, but when you see me I'm red. You don't see me too often. I'm there for you if you're hurt, but I'm good for you. What am I?
I'm not alive and yet I grow. Just put me next to where it glows. A favorite in summertime best with friends when combined
I have a head tail but no arms and legs.
It has no top or bottom, but it can hold flesh, bones, and blood all at the same time.