I actually had to deal with this issue when I was 9 years old and God asked me to kill my goldfish.
I was alone in my room studying when there was a dazzling flash of light and this deep, booming voice that seemed to be coming from everywhere at once said,
"QUAGMIRE!"
I said, "Oh hi God. Um, these aren't my magazines by the way..."
"QUAGMIRE, I COMMAND THEE TO KILL MR. BUBBLES!"
I said, "What? Why?"
"QUAGMIRE, IT IS NOT FOR YOU TO QUESTION MY COMMANDS! MY REASONS FOR REQUIRING THE DEMISE OF MR. BUBBLES ARE BEYOND YOU! "
I said, "Oh..."
"MYSTERIOUS WAYS AND ALL THAT, YOU KNOW!"
"OK, but that's not what I meant".
"OH!?!"
"Yeah, what I mean is: you're God, you can create and destroy galaxies. If you want Mr. Bubbles dead, why would you need my help?"
"NEVERMIND THAT!!..."
"And anyway, you've got all of eternity. If you really want Mr. Bubbles dead why not just wait 3 days until he kicks off on his own like all my other goldfish?"
"HMMMMM!!...."
"Hey wait a minute, this is a test, isn't it?"
"MAYBE!!"
"Uh huh, like that Abraham/Issac thing, right?"
"YEAH, (heehee)! YOU SHOULD HAVE SEEN THE EXPRESSION ON HIS FACE!!"
"Well, I'm not buying. Sorry. If you want Mr. Bubbles gone you know where he is".
"MR. WHO?"
"Mr....uh oh".
"SOMETHING WRONG?!"
"Oh, nothing...."
"FORGET TO FEED SOMEBODY LAST CPL DAYS DID WE?"
"yes"
"THINK MAYBE YOU SHOULD CUT BACK ON THE "STUDYING" A BIT?!"