Child labor makes goods cheaper for those in first world countries to buy. If that country prohibits the goods from being imported when they have been made by child labor, then there is no use for that labor to exist. First world buyers will have to pay more, but the sanctions will begin to eliminate the need for child labor.
Yes television can be educational. Don't forget television is simply a device. What you put on it is what makes it something. If there are things on it that teach kids to count or read or excersie then it is educational. The problem is most programming on television is not educational.