You can only visit so many gorgeous beaches and stunning land formations, on a vacation to a tropical island. We did have some down time, suitable for a couple of house-bound activities, and a good rule of thumb for hosting is to ALWAYS provide house guests with a choice of activities.
Our first 4 guests this year, in the Dominican Republic, were Domino Players. They play together, regularly at the Y, near their homes. While staying with us, if they had a couple of non-touristy hours to spare, they spent it playing Mexican Train Dominoes, on the patio of the Villa. (BTW...Mexican Train Dominoes has nothing to connect it to trains or Mexicans. )
Dominoes is played avidly, in all Caribbean Nations. It's probably one of the few things the feuding Dominicans and Haitians, have in common. Our guests were excited to observe Dominican locals playing Dominoes. The intensity of the play...slamming down tiles to complete your turn, was a little frighting for the four friendly-lady Domino players from Kansas. Turns out we have a outdoor Domino Pavillion, on the beach next to our house, and our snorkeling guests regularly find discarded Domino Tiles, along with sea glass and shells, in the surf. (Dealt you a couple of game terms, in that paragraph ;)
Then, on a whim, I decided to pack a 1000 piece Jig-saw puzzle, in my checked bag. All four groups of our guests, worked on the "Wizard of Oz Puzzle", completing it three time, during the vacation. It was a fun activity to discover pieces and parts of Four separate Dorothys, both the good and the bad witch, other characters and a plethora of yellow bricks.
BTW...I did look up the spelling of Domino....and the plural can be either an added e or es. Also, it seems that you may still win the Spelling Bee is you spell the singular, with a final E or not.
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Dear God. Your world is a wondrous place. There is so much to see and do. We are grateful for the opportunities that we have been given. Remind us to look at the whole picture and the whole world. We are blessed.

