We will be traveling with our kids (3&5) to the Paradisus next month (February). I have read coments about the pools being cold. We are planning on spending a lot of time in the pool with our kids but I am concerned that they will get to cold to enjoy it. Our son is a skinny little guy with zero body fat and gets cold after a while in our local indoor pool. I am thinking of buying a used shorty wet suit for him. Is it necessary?