The Eucharist is the most important sacrament of the Church, and with First Communion, this "gift" of Jesus is also given to children. The holy mass follows a specific order, includes various signs and symbols, and certain prayers are recited – all of which can be difficult for children to understand. This book explains the individual parts of the holy mass to children: each double page focuses on Kyrie or Gloria, readings, the Gospel or the intercessions, the preparation of the gifts, the consecration, etc. A colorful collage visually highlights the central message. The processes and the background of gestures and prayers are explained simply, revealing the "mystery" behind this part of the mass: the corresponding statement in the Bible. The book is suitable for preparing for First Communion in school and community.