Ask the older ones to take notes of King Benjamin’s address. You could have them take notes for the entire length of his address, comprising Mosiah 2 all the way through Mosiah 6.
What do you think they wrote with? What do you think they wrote on?
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.