Would you like your preschooler to behave better? Changing what they watch on TV might be the answer.

"I'll try and distract her and do something else, and she'll just go right back to the TV so usually it just ends up getting cut right off," said Amanda McCoy.

Amanda McCoy's daughter is 14 months old. Besides watching her own daughter, Amanda watches three other kids. They range in age from only a couple months old to three years old. So Amanda's TV is usually turned off.

"Especially six months and under, it's because of the focus of their eyes," said McCoy. "So when they watch TV the focus of their eyes goes off. Their pupils dilate more than they should. And then six months and up it's because the mind should learn to be creative."

The American Academy of Pediatrics says that children under the age of two shouldn't watch television at all, but when you begin to introduce TV you need to limit the amount of time they spend watching TV to no more than one to two hours a day.

"When you do begin to introduce they say about 15 minutes at a time and then to cut it off," said McCoy.

What kids watch is also important. A new study done by the journal, Pediatrics, showed how swapping violent TV shows for educational ones decreased aggressive behavior in kids between the ages of three and five.

"If they are going to watch TV in a limited amount you want them watching good pro-social shows," said SU Psychology Professor Laura Zimmermann. "Shows that encourage good behavior. Shows that are designed for them."

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