Search: Where else in the scriptures can you find the duties of priests and teachers?
Activity: Draw a picture of what you think ordination looks like. What is the same about the way we ordain brethren to the Aaronic Priesthood? What is different?
Make family scripture time productive. Get the kids excited. If kids can see how the Book of Mormon applies to them and if reading the Book is FUN, you might hear, "Is it time to read yet?", rather than, "Do we have to?" We are counseled to SEARCH the scriptures, not just read them. It takes preparation to do that with children. This is the preparation that I've done. Now I have it for reference next time. And you do too. Comments welcome.