If you are an American Citizen you will not need a passport. (Just birth certificate with raised seal and government issued ID)Although it is always best to have and travel with a passport. So, get one for future trips! Also, yes - you can bring in baby food, but you can also buy baby food at any grocery store in Aruba. You will be amazed how American Aruba is.... You will enjoy it so much! It is the best place for babies - kids of all ages! Have fun!