10. The Submarine
Materials Needed: 2-quart plastic bottle, balloon, plastic tubing (3ft in length), silverware (3-4 table knives) and kitchen sink or pail.
In the upper and the lower parts of the bottle, make holes in 1 to ½ inches in diameter and then insert one end into the opening of the balloon. If it doesn’t want to fit snugly, you can use masking tape. After this, you need to place the knives in the bottle through the holes and insert the end of the tubing in the bottle’s mouth. Position the balloon in the middle of the bottle and your submarine is ready. Put the bottom in the sink and fill it with water until it covers your submarine.
