1st take a sheet of 3/4 plywood and draw the side of the ship. make sure you will have enough plywood to flip it over and trace it for the other side of the ship. making the ship shape is just a little thought and imagination. or look on the Internet for ideas. mine is about 5 feet tall and 3 feet wide.
Step 1: THE FRAME
you can use 1/4 ply wood for the roof, floor and back wall and even some of the front end. i used 2x3's for most of the framing. but you can use 1x? pine also.
make the floor frame and back wall frame then cover them. as seen in photo.
Step 2: FRONT END
a table saw i nice for ripping the angles.
i also made a toy box in the front by hinging the 1x12 hood, and putting a piece of 1/4 plywood to devide the cab area as seen in photo.