You can bring a baby of any age probably, but someone needs to stay with them that will be mostly walking and not riding or seeing any shows. You can take them on FM only if they wont cry 1 time in there. They will eventually cry at the time that you most want them not to. So, you cant take them in any show, on the train, or in the cave because people want to hear the show or the guide. Restaurant is also a bad place to take them. Having a crying baby anywhere ruins everybodys day. If they cry, take them to the bathroom PRONTO. Dont ruin everyones day.