Hall of Infinite Doors

That convinces him entirely, and he hops into your car. About 1/3 through the ride home, he starts complaining how it is taking to long and he had to use the restroom. You figure he was lying, so you ignore him and don't stop.

When you get him to your house, he has both defecated and urinated on himself, and has fallen asleep.

It doesn't matter to you. A little boy is a little boy.

Congradulations! You succeeded in getting the little boy!