Rubber Band Powered Container Ship

This is a boat I designed in 1 hour. to assemble first put the propeller in the back. Then attach the hook on the propeller from inside the boat. then put on a rubber band. Next get the cargo ship top and 2 rubber bands. Put the top on the ship and attach it in the front and back with double stacked rubber bands. finally the cargo crates that have a hole in them go in the back and the one without goes in the front. Now spin the propeller and watch it drive away.