Answer:
The shorter I am the bigger I am.
I have a little pool with two layers of wall around it. One white and soft and the other dark and hard. What am I?
I am not very commonly found! Only in some rainforest! I have an odd number of toes! I'm very lazy and hang upside down! What am I?
I am lighter than air but a hundred people cannot lift me. Careful! I am fragile!
I suck.
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.