What is something that is too difficult for you?
...
What is something that you find too easy?
...
How much money for you is too much money?
...
What is something you don't have enough money to buy?
(yet)
Have you ever eaten too much food?
...
What age is old enough to serve in the military?
...
What age is old enough to vote?
...
What age is old enough to buy cigarettes and alcohol?
...
Have you ever felt like you were not smart enough to do something?
...
Have you ever felt like you were too smart to do something?
...
