Answer:
What is at the end of every rainbow?
An appropriately loud response to fear, excitement, or your team scoring.
What age most travelers have?
I'm often served as a "rack of ..." I'm often smoked or grilled, with bones in, and slathered in BBQ sauce.
What is filled with air and sometimes a gas, tied to a string and often seen on your birthday?
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?