Answer:
I'm an old relative who's hand's can't hold anything and eyes canβt see anything
When you are inside me you will be encouraged to slam other cars.
What happens when you throw a green stone into the Red Sea?
What starts with the letter βtβ, is filled with βtβ and ends in βtβ?
Lighter than what I am made of, more of me is hidden than is seen. What am I?
No matter how little or how much you use me, you change me every month.