Answer:
I am used when you jump off a bridge for fun.
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 run up and down the stairs without moving
I am flora, not fauna. I am foliage, not trees. I am shrubbery, not grass. What am I?
I'm white and I'm used for cutting and grinding. When I'm damaged people usually remove me. What am I?
I fly to any foreign parts assisted by my spreading wings. My body holds an hundred hearts Nay I will tell you stranger things when I am not in haste I ride and then I mend my pace anon.