America's youth builds and flies model planes on miniature flying fields.Two American boys light the rocket which sends off their model rocket ship, which they have designed and built in a home workshop. Like millions of other young Americans, they are learning in home and school workshops the basic principles of aeronautics which will stand them in good stead in the air-minded post war world. Many U.S. high schools have recently added courses in aeronautics to their curricula. The National Aeronautics Association through its model divisions, the Academy of Model Aeronautics, has formed an Air Youth Division to bring a coordinated activity in aviation to American youngsters. Post war plans include an Inter-American Model contest to bring the young model builders of South American countries, the U.S. and Canada into friendly competition