Dear 100 Hour Board,
According to Joseph Smith, young children who die will have the opportunity to be resurrected as young children and to be raised by their parents in what I assume will be the Millennium. (See Teachings of the Prophet Joseph Smith manual for quotes on that). That's great!
But there's also the doctrine that little children that die before the age of accountability will be exalted, saved by Christ's Atonement.
So will a six-year-old child that's resurrected and raised in the Millennium already have his calling and election made sure or what? That can't be right. I'm obviously missing something here. You see the dilemma, right?
This is a great question. I had to think about it for a bit, but I came to an answer.
If these children were raised from the dead to live again as mortals, there would be a problem of agency. How can exaltation be forced on someone who can still make mistakes? But these children won't be mortal. They'll be resurrected beings, with the full perfection and glory of the celestial kingdom. They'll just appear younger physically at first. There's nothing imperfect about being young, and being resurrected won't magically make their bodies older all at once.
So they'll be like any other resurrected being, perfected and glorified. Yes, as resurrected beings we'll still have opportunities to choose and progress. But when we're resurrected we won't have to struggle against the natural man. We'll have it completely in our power to live the perfect life we've proven that we desire. Accidental mistakes will be a thing of the past, and rebellion, though theoretically possible, simply won't happen.