Aviation theme/topic is very broad, aviation world needs to reflect the human spirit of taking challenges, exploring nature, pursuing freedom, and dreaming about future.
It could be based on the type of aircraft, from fighter jet, cargo airplane, helicopters, aircraft carriers, etc. and also based on aviation technological category such as engine, aerodynamic shape, control system, radar electronic system, etc. or by type of military and civic use. They can all be mixed, not just for leaning, but bring entertainment riding experience.