In the United States, Federal labor law limits the employment of children. The restrictions on employing people under age 14 are rather severe and would probably preclude any sort of internship:
http://www.youthrules.dol.gov/know-the-limits/under14.htm
This is probably the summer to work on side projects. Next year the rules allow a far wider range of employment opportunities:
http://www.youthrules.dol.gov/know-the-limits/14-15.htm
The fuller explanation is here:
http://www.dol.gov/whd/regs/compliance/whdfs43.htm
Good luck.