To the best of my knowledge, every state has child labor laws. There are also federal child labor laws. To find Texas' child labor laws, google 'Texas statutes, labor code, chapter 51'
which state did not have child labor laws in 1914?
Canada has child labor laws.
No, see the link below for the US Dept. of Labor's state by state laws regarding child labor.
Yes, there are many rules and laws about child labor. There Federal laws set as minimum requirements and many states have stricter laws.
See the link below for the Wisconsin Child Labor website.