This prayer cube includes: Our Father, Hail Mary, Glory Be, St. Michael, Guardian Angel, and Fatima prayers.
I have used this with my own children and Faith Formation classes for many years. After assembly, have a child roll the cube. If the children already know the prayer, then have them pray aloud with you. If it is a prayer they don't know yet, have them repeat after you line by line. They'll have them memorized in no time.
Helpful hint for assembling- Gooey glue works better than stick glue OR simply tape the edges if you don't feel like dealing with glue at all.