It's a Mystery! Catholic Children's Retreats blend old and new, giving children an opportunity to learn and experience their Catholic heritage. The Holy Trinity introduces children to basic facts about the Holy Trinity. The Perfect Personality dramatizes personal attributes of the Holy Trinity. The Secret Garden focuses on Marian dogma and tradition. The Household of God teaches children about the Catholic Church, the pillar and foundation of truth. The retreats can be enjoyed in any order, as each one is independent. However, the series begins with the Holy Trinity because even the most basic understanding of God is the foundation of wisdom.