Start out with the hull. Have the group assigned the hull name and explain it to the rest of the class. Have students attach this part to your bulletin making sure the part is clearly labeled. Galleons and other sail ships used wind alone to get around. They used sails.
Sails get in the way of the wind, which has force, making the wind push the ship.
Think of the pull you feel when you hold the string. Now think of tying the kite string to a small boat on a lake. In order to have a place for the sails a ship needs masts. Have the group with the masts explain what a mast is. Then have them install the masts on the ship.