Answer:
I have a neck but no head. I have a body but no arm. I have a bottom but no leg.
Without this, eating food and Steven Spielberg's career would be very different.
What travels from house to house and is sometimes narrow and sometimes wide but always stays outside?
I move without wings, Between silken string, I leave as you find, My substance behind.
They have not flesh, nor feathers, nor scales, nor bone. Yet they have fingers and thumbs of their own.
People take me on walks and I run and have fun. What am I?