Best excursion for an active mom dad and 2 17 year old girls?

[minniegidget]

Need some help for a friend that is going on a Carnival cruise Saturday. She asked what I think would be fun for the 2 girls. She said she has done a little research but  things she was reading said a lot of places are ran down since the reopen of covid.  Any suggeations?

[crewsweeper]

If all snorkel, that's the best thing to do.   There are several excursions .