Tips for traveling internationally with three kiddos?

Stephanie
This fall my husband and I are going to another country. We've decided to bring our three babes (3 month old, 2 year old, and 6 year old). Does anyone have experience with this and what tips do you recommend with flying with two littles (especially the 2 year old)? Any other tips for once we are in Jamaica? Like essentials to pack to make it easier?