Child labor is a continuous thing related to slavery by factories not having enough employees or very poor families not being able to gain enough money would be manipulated by someone promising money and edu. for their child or selling the child into labor or forcing them into it.
Whats the eastern question i may ask then i will answer
Two of the major ways in which the Civil War amendments (commonly referred to as the Reconstruction Amendments) added to individual freedoms was that they abolished slavery and involuntary servitude (with the 13th Amendment) and made it so every US citizen had equal protection under the law (with the 14th amendment).
3 or 4 state legislatures would have to approve.
hope this helps. ;)