Later on I started to build warships. Generally speaking paper ship building is very difficult and not recommended for inexperienced modelers. Paper is not an easy material to work with, it takes time to learn how to shape parts, make right cuts and glue them together. Paper models are not only for fun. They teach many skills.
Children can learn patience, problem solving ability and increase spatial acuity.
I'll be very happy to answer any questions as much as I can regarding paper modeling.