Mom,
I'm sorry if this is alarming. Everything is fine, nobody's hurt or in danger. I have something I want to ask of you, though, you and Dad and Aunt Sophie. After you've read this letter, you'll have a chance to talk it over with both of them, and with me - and my friend Leo Salk, who is also involved in all this, if you want. It's a really big choice, and in a way it's kind of a really awful and sad one, too, and I'm sorry. But I'm not in trouble, and no one's going to be in trouble no matter what you choose. In fact, everything's going to be a lot better than we ever thought it would be.
Executive summary: My friend Leo Salk and I both just gained access to a source of magical powers. He's helping me produce it and make good use of it. It's very powerful and versatile, and we think that if we think it through and leverage it properly we can cure basically all diseases, give everyone on Earth a safe home and enough food to eat, push out human life expectancy as far as people want it to go, and even resurrect the dead, maybe everyone who's ever died in all of history. But we want to do it right, and every second that goes by, people are suffering and dying. Think about all the most horrible, unspeakable things that are happening in the world right now, everything we have to just not think about because we can't do anything about them. I could stop all of them in an instant, if I do this right, and I don't want to allow any of them to go on a second longer than I have to.
That's why one of the first things Leo and I did with our magic is use it to stop time. We're hiding out in a sort of secret lair that Leo used our magic to conjure; time's passing for us, and now for you, but not for anyone else in the universe. Leo and I have been in stopped time for a few days, mostly experimenting with magic and thinking about plans for what to do with it.
This is the really awful part. If I can possibly avoid it, I don't want to restart time until we're ready to deploy our plans for distributing magic food-and-safety to as many people as we can, and we've only just started making those plans. I'd like more people's help planning. The really awful sad choice that I'm going to ask you to make, you and Dad and Aunt Sophie, and maybe a few other people, is whether to come join us in our lair, inside the stopped time, and live with us for as long as it takes us to work out what the best thing to do is; or else go back out of stopped time, and let me and Leo make our plans on our own. If you say no, then after we're done saying goodbye, it will seem like an instant for you until you see me again, but a lot of time will have passed for me - probably months, maybe years. If you say yes, you'll get to come into the lair, and help us plan, and all the time that passes for us will pass for you too; for everyone else, outside the lair, it will seem like an instant before you can see them again, but time will have passed for you that didn't pass for them.
You can take time to talk it over with Dad and Aunt Sophie, once you're ready, but I'm not going to unpause time in general until it's time to save everyone. That's part of what makes it awful and unfair to you, and I'm sorry.
I sent you this letter because I worried that if I tried to just walk into your office and explain everything, it would be confusing and alarming in the wrong ways, but I'm actually right outside your office door,