Answer:
What is filled with air and sometimes a gas, tied to a string and often seen on your birthday?
A tasty reward given to well behaved dogs and kids
Passed from father to son and shared between brothers, its importance is unquestioned though it is used more by others.
What has fingers and a thumb but no hand?
It weighs next to nothing but no one can hold it for long. What is it?
What never gets any wetter no matter how hard it rains?