2. For minors under 18, there are restrictions on the number of hours and type of work they are allowed to perform. See link for details: http://www.dir.ca.gov/DLSE/ChildLaborPamphlet2000.html#42
3. There are likely to be some restrictions regarding the number of hours that your child can work per week during school, enforced by the college that your child is attending, in order to receive scholarships or financial aid. This is not a labor law, but a regulation by the school to ensure that your child is spending more time studying and less time working.