Answer:
Man's most important invention.
What has ten letters and starts with gas?
Break it and it gets better, immediately set and harder to break again.
What is often returned, but never borrowed?
If you blow past your destination, you'll have to throw your car into this.
I am a room that has a roof but no walls. What am I?
Easy
Animal
Difficult
Food
Funny
Kids
Logic
What am I?