Answer:
I can move even when you are still. I can be one or many.
What holds names and memories which are not its own?
This is rectangular, hollow and has a lid, and where you’ll find it you might wonder, it is just six feet under. What is it?
What can be forever wound up but never annoyed?
What has a neck and no head, two arms but no hands?
People take me on walks and I run and have fun. What am I?