/* Main Intro Text */
"Coloring Fun" = "Coloring Fun";
I'd say "Kleur plezier", coloring fun is just English.
/* Text for the creation pic */
"Creation" = "Aanmaak";
Creatie like Phemox says is much better, but even more used is "De Schepping". This only applies to religious tales about the creation of the world, species, e.g. the creation from the hands of a God (doesn't strictly apply to the meaning of God by Christianity though).
/* Text for the christmas pic */
"The First Christmas" = "De Eerste Kerst";
Is this meant as first christmas day? Because then you'd need to call it "De Eerste Kerstdag"
/* Text for the sacrifice pic */
"The Sacrifice" = "Het Offerfeest";
"Het Offerfeest" means a celebration of a sacrifice. "The sacrifice" may refer to "Het Offer", the sacrifice ritual or the sacrificed subject, or "De opoffering", a subject sacrificing itself (for others).