Catholic Mass Books and Missals for children and children's missals are a great way to help your child learn more about the Mass while being entertained at the same time. There are children's Mass books for all ages, so your child is never too young or too old to find a Mass book that is just right to help them understand Mass at their level. Children's Mass books and missals are the ideal way to help your children grow to love and appreciate the Mass at any age. A class gift for the Sacraments of Baptism and First Communion.