Death means vanishing in thin air

I was talking to Judah and mid way told him that he'll grow up and go to high school.
"Then what's next?" he repeatedly asked to which I kept giving him an answer until I pooped out:

Then you go to college.
Then what's next?
Then you get married.
Then what's next?
Then you have kids.
Then what's next?
Then you play with them and tell them to brush their teeth.
Then what's next?
I don't know.

Riva chimed in "Then you die".
"How do you die?" Judah asked.
"You get really sick and then vanished in thin air" Riva replied.