Answer:
I contain six letters minus one and you got twelve.
I have a ring but no fingers. I used to stay still all the time but nowadays I follow you around.
I will disappear every time you say my name.
I widen my jaws when you poke two fingers in me. I especially like to devour papers
I am found on Mercury Venus Earth and Mars but not on Jupiter or Saturn. What am I?
A little house full of meat, no door to go in and eat.