Mark the middle of each sail. You can do this by folding the sail in half without making a crease. Pinch the corners lightly to mark the middle. Unfold.
Make a pair of holes on each sail along the middle—one about ½" from the top edge and the other ½" from the bottom edge. The holes should just be big enough for the wooden dowel to get through.
Take the longer mast. Insert one end of the mast through the holes on the middle-sized sail. Carefully move the sail down the middle of the mast.
Next, position the smallest sail. Similarly insert the top end of the mast through one hole on the sail, then out the opposite hole. Adjust the position of both sails so that the top edge of the smallest sail is 1½ to 2 inches from the tip of the mast.
There are a number of materials that can be used to hold the masts upright inside the ship. The masts can easily be anchored into a ball of modeling clay or a small chunk of Styrofoam packaging.
In this tutorial, we will show how a toilet paper roll can be used as an anchoring material. Use the point of a pencil to punch a pair of holes, each one about an inch from the edge of the TP roll. Push the pencil until each hole is just large enough for the mast to get through.