Is there a good way to explain moving away to a kiddo?
Calmly and in terms they understand. Maybe, we're going away for a while. Mommy/daddy has a new job and we have a new house. You'll get to make new friends and go to a new school? Make it sound like a good thing
Be truthful and tell them they will make new friends. Don't exaggerate, and don't embellish. That will only make matters worse and cause resentment later on.