I've loved reading these with my kids, ages 7, 5, and 3, each day. Even my 3 year old is retaining some of the concepts. They are well-written, kid-accessible explanations of larger theological ideas followed by some solid thought provoking questions. I'll definitely use them again in the coming years. The one thing that would have made these perfect for me as an advent devotional would be if they included an option scripture passage for us to read along with the card. Highly recommend the ABCs of Christmas. If you're on the fence with Family Tree or ABCs, go with ABCs.