What a fabulous idea for you and your family to enjoy the beauty of Puerto Rico, and experience it's culture first hand through the native tongue. It would be a great idea to buy a very basic introductory book now so you are versed on some of the rules of conjugation, and then when you get here you can jump right in to the conversation with a local instructor. I have also found that vocabulary flash cards are great. Check with the host of the villa or guest house you are staying with, most are very gracious about accommodating their guests, and have some favorite locals they employ. You might enjoy a catered criollo meal prepared by a local, have them explain everything in Spanish, the housekeepers and ground keeper's will all love to speak to you in Spanish. Go to a local barber or hair dresser while you are here, it's a wonderful experience, and you will want to understand everything they are saying, it's where all teh talk of the town happens. Church services will all be in Spanish. You will have so much fun immersing yourself in the language, Enjoy, we applaud you in this endeavor.