Parents have long been warned... TV can be bad for kids. But a new study suggests some shows could be beneficial.

FOX News Radio's Jennifer Keiper reports:

When you sit your child in front of the TV and this comes on...

('Dirty Harry')

A new study suggests flipping it to something like this...

('Yo Gabba Gabba')

The Seattle Children's Research Institute says that educational TV can improve the behavior of preschoolers, making them less aggressive.

While it's only a modest improvement that can fade over time, the lead author says it shows that what children watch is as important as how much they watch.

Jennifer Keiper, FOX News Radio.