El libro de oraciones católicos para niños

As you requested: The Catholic Children's Prayer book is now available in Spanish! El libro de oraciones católicas para niños is a beautiful keepsake, in a colorful illustrated format that's easy for young readers to get excited about learning and doing the prayers of their faith. 

It features all of the Mass Prayers, Everyday Prayers, Rosary Prayers, as well as an informative guide on how to pray, all translated beautifully in Spanish.