"...for our sins."

My niece Hallie asked me if I remembered her friend Oliver from daycare.  I told her yes I remember him.  She then related this story:  "Well my friend Oliver, he asked me, "Why did God die?"  And I told him, God didn't die, Jesus did.  And then he asked me, "Well, why did Jesus die?"  And so I told him, Well, like, for our sins."