what kind of size hotel, or budget?
i stayed in sandos carocol eco resort (theres a playa carmen one. but i stayed in the one just called "sandos eco resort and spa) last month and i loved it! the buffet was incredible, loads of options and it has a kids club, and its basically all kid friendly except for one adult only pool on the main resort (and an adults only section off to the side). its also very pretty...and there were also loads of different animals either in enclosures or wandering about. which i thought was pretty cool and im sure a kid would (you do have to explain to kids not to touch them though, im not a parent so not sure how hard it is. theyre not going to randomly attack you but they are pretty much wild)
i also liked the beach there and the room i stayed in was very nice. you can snorkel in the water (not the sea..is like a river/cenote type thing)could be worth thinking about!
heres one of the kinds of animals you can find on the paths. i must admit, ive forgotten the name and dont know what it is. but it was pretty cute! the wedding planner there (fernanda?) was also very ncie and friendly and pretty quick at replying
i know its hard to pick a resort when you arent there...check out reviews and make a list of the things that are most important to you (beaches, food options, kid activities, number of pools, etc etc. do you watn a private reception or just a meal in a restaurant, do you want dancing, gazebo wedding/beach wedding? beach reception/pool reception/restaurant reception) and then look at reviews brides posted to work out
oh i have a pic of a wedding i saw there too, thye kept it pretty simple...but you can add rose petals in the aisle, more flowers or whateve ryou want