J.S.
We just got back from a family vacation in Puerto Vallarta, Mexico. It was great with kids. We had our 1 yr old daughter and 2yr nephew and 3 yr nephew.
We had childcare available at an all-inclusive resort but never used it since we had 6 adults for 3 kids. We went to beach and pool and swam with dolphins, more options are available if you leave the resort more often.
We booked airfare and all-inclusive resort together and saved $.
J.