My niece is going to be baptized in the fall, and I've been asked to be the godmother. This is part of her gift; she'll also get a book. I made the pattern myself. The six sides all have religious symbols (the picture is of the cube unsewn so you can see all the faces of it):
2-Chi and Ro superimposed on each other; the first two letters of "Christ" in Greek
4-Alpha and Omega; from Revelation
5-I. H. S; In Hoc Signo, Latin for "In his sign"
6-I.N.R.I.; Iesus Nazarenus Rex Iudorean; Latin for "Jesus of Nazareth, King of the Jews"
I used leftover bits of fabric for this; not sure what they are!