Answer:
I don't live within a house nor do I live without. Most will use me when they come in and again when they go out.
I am a word. I become longer when the third letter is removed. What am I?
I am a shimmering field that reaches far. Yet I have no tracks and am crossed without paths. What am I?
I work when I play and play when I work
I am a ship that can be made to ride the greatest waves. I am not built by tool, but built by hearts and minds. What am I?
What age most travelers have?