Writing Feedback / V-chip to block TV channels by parents - agree or disagree? [5]

Nowadays parents are worry becauseabout their children spendspending as much as five to six hours for watching television; especially, it offers so many unwanted content channelsprograms for the watchers. Fortunately, v-chip is one of the effective ways way to prevent children from viewing these unsafe media by helping parents to block objectionable shows, preventing children from obscene and indecent programming, and reducing hours of watching television.

This is few mistakes that I found in Paragraph 1.
Thx.