An estimated(1) (2 / 3 / 4 ) seven million American kids are home alone after school without adult supervision. They often watch whatever TV shows they want. Parents concerned(2) (2 / 3 / 4 ) about their children's use of the media can take control. The V-chip, installed(3) (1 / 2 / 3 ) in television sets manufactured(4) (2 / 3 / 4 ) after January, 2000, is a device that allows parents to have control over the programs watched(5) (1 / 2 / 3 ) by their children. All TVs with screens thirteen inches or larger must have a V-chip.