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.