Not in most cases. Youths under age 16 working in a business solely owned or operated by their parents (or by persons standing in place of their parents, such as guardians and foster parents) can work any time of day and for any number of hours. However, parents cannot employ their child in manufacturing or mining, or in any of the hazardous occupations listed in the previous question. In most cases the same is true of state law. For more information contact your state's labor standards office.