Hi Sting, welcome to Cruise-Chat! I do hope you enjoy Princess as much as we do, they're our favorite line. They should be having Easter Egg hunts, and the Easter bunny for the children and they will have a church service, too. It's a nondenominational service, and sometimes they will have mass.
In case you're interested, here
are some pictures of the Emerald which is a sister ship to the Ruby.
Hope you have a marvelous cruise and fabulous weather!