Estes stratosphere rubber band glider estes a es3430 this elegant balsa glider from estes is easy to build and even easier to fly assembly takes just minutes with no glue required wind the propeller until the rubber band is taut let go and simply watch the glider soar through the air the attached wheels help to provide a safe landing so you can enjoy send your glider into flight time after time estes a es3430 stratosphere balsa rubber band glider