To design, construct and fly model aircraft may be the most in handy way to challange the gravity while still keeping a good controll of the craft. However, the process in building the craft is not easy and demands experience and skills. Flying can be a bit tricky as well, especially since the craft is constantly seeking it's ground level (lying in pieces on the ground), but as with everything else, some training and interest takes a man great distances!
I bought my first model aircraft when I was 16 years old, an over-weight ARF-model, and succeeded to convince my parents to buy me a radio controller for christmas. The aircraft suffered radio disturbances and became coffee-wood on a barn roof. However, a crash may sometimes increase the interest with its overwhelming power of destruction, so in the upper secondary school, my project was to design and construct a model aeroplane. The design was based on the Eastborne monoplane and actually flew OK:
Launchpad McQuack's Joyrider