The old family.disney.com website (later known as "Spoonful") had lots of great papercraft projects parents could do with children. But alas, the Spoonful website shut down in 2014. One of the Spoonful projects I liked, was this easy printable pirate ship. The playset included a 3D ship, cannons, and some 2D pirate figures (including a few skeleton crew members!) An archived copy of the playset's PDF template (along with instructions) may be found at this:
download link. Besides paper, what else is required to build this ship are some drinking straws to hold the sails to the masts.
Other Spoonful Paper Projects:
Princess Paper Dolls18" Jack Skellington Figure3D Nemo PapercraftWonderland Easter DioramaTeardrop Mickey