its good you are thinking about your future at an early age, but i think whatever you do, it wont hold too much weight in impressing them. But, perhaps you could chose a NACA airfoil profile of your choice; model it and derive the wing performance from force measurements from a low speed wind tunnel. hopefully ending up with the wing lift curve slope.
Or, if you dont have access/motivation to build all that eqipment, just do a theory report on the effect of downwash on the local flow over a local airfoil section of a finite wing.
both are relatively simple and out of any projects you could do these are possible more weight-worthy. Either way, you are a mug for doing general studies!!!