Passports for kids

Hi. I'm traveling with my 2 kids ages 4 and 5 on a 4 night cruise on the Dream to the Bahamas in about 6weeks I was told when I booked I didn't need passports for the kids just birth certificates...myself and hubby do have passports just not the kids. Just wanted to make sure we weren't misinformed!

You don't need to have passports for the cruise. It would be great to have them, but you don't have to get them to take them on the cruise.