Answer:
I am rubber you can eat!
I am taken from a mine and shut in a wooden case from which I am never released. Yet I am used by almost everybody. What am I?
I make a loud sound when I'm changing. When I do change I get bigger but weigh less. What am I?
I come without being fetched at night hides away as soon as daylight strikes. Although I may look small I am much mightier than what you can imagine.
I come in different colors and shapes. Some parts of me are curvy, some are straight. I look like I can belong anywhere but there is only one right place for me. What am I?
What made Cyclops quit teaching?