I don't think you'll have any trouble staying busy. There is more than enough to do and your son will have a great time. Like PP said, pack warm clothes (jeans and sweatshirt, and tank tops and shorts, because that time of year can go either way) We go in early Jan every year. Last year (this past Jan it was very cold, pants and coats about every day, we had a real warm day our first day but we didn't get there until late afternoon and by the time it got dark, it was pretty cold. We did go to the pool but my sons lips were turning purple. I had to drag him away because he wanted to stay and swim. So maybe prepare him that if it is too cold out, he cannot swim that way he won't be too dissapointed. Although your son is older and can probably make that choice himself. Have a great trip.