Around the 1700's and early 1800's , factories began using power-driven machines and children began to run them. They would work 12-18 hours a day for 1 dollar.
Through 1802 and 1878, Britain created laws that "shortened the working hours, improved the conditions, and raised the age at which children could work."
In 1938, "Congress passed the Fair Labor Standards Act." This allowed ages 16+ to work during school hours, 14+ to work in specific jobs after school, and 18+ to work in risky jobs.