Don’t use your TV as background noise. A study in the journal Child Development found that even if children aren’t watching the TV, simply having it on in the room decreases the time they spend playing with toys -- which fosters learning much better than passive activities (like staring at a screen). So when your child isn’t watching a show, turn the TV off. Background music is a better option -- though if it’s heavy metal or hard-core rap, maybe not so much.
From The Smart Parent's Guide: Getting Your Kids Through Checkups, Illnesses, and Accidents by Jennifer Trachtenberg.
Find out more about this book:The Smart Parent's Guide: Getting Your Kids Through Checkups, Illnesses, and Accidents