the constitution is the law that restricts government not the people.
I wish more people would get that into their heads. It is not rocket science.
First of all all not all of the constitution is solely meant to "restrict" the government. I wish people would get that into their heads. Read the 16th amendment for example, and tell me how that "restricts" government.
The constitution is in place to state (or potentially change) what the government can and cannot do-it's not solely to "restrict" as you two have stated.
Now the issue of child labor laws is whether the government has the right to say whether children shouldn't be able to work or not correct? So the real question is what laws can the government pass or not.
So how can government have the ability to create murder laws, but not have the ability to create laws preventing child labor? By the way, in both examples the government is restricting actions of citizens, neither which are in the constitution. When you two can explain that-then you can continue you're misunderstanding of the constitution.
So now would either one of you care to explain how one of these is constitutional, and the other isn't. Go!