gather all materials. you will need: 7 dimes, a water bottle, a long plastic tube, a glue gun, a balloon.
step 3: hot glue three dimes together and then hold glue the other four dimes together.
step 4: hot glue the three dimes onto the rear end of the water bottle (the opposite side of where the cap is. make sure that it is glued to the side of the water bottle where the holes are.
step 5: hot glue the four dimes to the front end of the submarine (the side where the cap is). make sure that it is glued to the side of the water bottle where the holes are.
step 