Hello!
Short part from the Challenge FAQ:
Who's eligible to participate?
* The Android Developer Challenge is open to individuals, teams of
individuals, and business entities. While we seek to make the
Challenge open worldwide, we cannot open the Challenge to residents of
Cuba, Iran, Syria, North Korea, Sudan, and Myanmar (Burma) because of
U.S. laws. In addition, the Challenge is not open to residents of
Italy or Quebec because of local restrictions.
* You must be of legal age in your country of residence in order
to participate.
* Employees of Google, members of the Open Handset Alliance, or
affiliated companies are ineligible to participate.
* For more information, please see the complete set of Terms and
Conditions when they become available.
The part that applies to you would be the part about the legal age,
which means that you need to be adult to compete.
Sorry
Greetz apocalip