I will be leading a small, multi-aged group of children whose parents are preparing to serve as missionaries for the United Methodist Church. Anne, your above lesson comments on discord within the family (though in our case it may be parents rather than brothers) and the emphasis on God always being with us and always working for the good seem like just what we need.
Rotation.org's Sunday School Lesson & Resource Forums

We are an online community of Sunday School teachers, Christian educators, and pastors creating, collecting, and sharing free and premium Sunday School lesson plans, creative ideas, and discussion. We are also the official website of the Workshop Rotation Model (The "WoRM"), a creative way to organize and teach Sunday School. Visit our Bible story lesson forums. View our creative Writing Team Lesson Sets. Explore our 24 downloadable Bible story software programs. Get a free Registered Membership or become a Supporting Member for full access to all site resources. Learn more about our volunteer-led, ecumenical, non-profit, ad-free resource ministry!