There is so much to splurge on in Cancun! Jetsurf Mexico is costly but so much fun, even if you have never surfed before. Aquaworld has so many good tours for you and your family. The B.O.B tour is fantastic, it’s like a personal submarine that kind of looks like your riding a big seahorse. They also offer diving/snorkeling as well as a bunch of other really fun adventurous tour options.