Answer:
I am rubber you can eat!
I am seen in the water. If seen in the sky I am in the rainbow a jay's feather and lapis lazuli.
hide me from your parents if you have done bad academically this year.
I am needed for most animals and hardcover books. What am I?
I am used when you jump off a bridge for fun.
No matter how little or how much you use me, you change me every month.