Answer:
I am often sold by children entrepreneurs in summer time
My first is in some but not in all. My second is in tiny but not in tall. My third in little but no in big. My fourth in port but not in pig. My whole is made in nature's way. For clothing rugs used every day.
What color can you eat?
I save lives on the ground and in the air
My first is second in line; I send shivers up your spine; not quite shining bright I glitter in the light.
No matter how little or how much you use me, you change me every month.