You can find these online. The best way to find them is with an image search online and then you can choose the best option.
Claws shell pinchers
yes. their shell gets darker as it grows
That could very well be a pseudo scorpion. They can be very small and have pinchers. If you would have said it was anything bigger I'd have said an earwig. Look at the links for pics.
brown
It is the same as a regular chicken shell.
I'd definitely say brown. :)
No the eggshell of brown eggs is not thicker than the eggshell of white eggs.
Only if you poo on it
Green with a brown shell.
A cicada I think. Leaves a brown shell. Very common in GA.
The male has white stripes on his shell and the female has brown stripes on her shell.
what kinds of things can you do from a shell