We took our family of 5 (kids were 10, 3 & 18 months) to Playa Del Carmen Mexico last year and although we didn't like the food where we stayed it was alot of fun, beach was beautiful and the fact that they had a Wal-Mart close made me feel comfortable. I had prefilled antibitiocs from the Dr. in case we needed them, which we never did. My oldest swam with the dolphins, snorkeled, jetskiied with DH, while the little ones and I built sand castles, splashed around and they napped under the palm trees or in the hammock with Mommy. It was nice. To be honest, we prefer Disney as it is geared toward them there as opposed to the beach where by day 5 they may not want to build another sand castle. We are looking at trying Beaches next time we take them on an island trip for that exact reason. And we took a "alone" trip to Sandals Cuba in May and we loved the upscale feel to that chain. The 5 star we stayed at and paid for in Mexico wasn't even close to the 5 star that Cuba was and we heard that Cuba was worse as far as star ratings. To each her/his own I suppose. Try
www.locogringo.com for info on PDC & Area. Akumal is supposed to be amazing!
Have fun!