Kids will be kids, and accidents happen, but certain activities carry more risk than others.Injury is still the leading cause of death for children and teens in the United States, according to the U.S. Centers for Disease Control and Prevention, and unfortunately, many of these are preventable.We spoke to pediatricians who are also parents about things they'd never let their children do because of the heightened risk of injury or death, and how to make sure your child is as safe as possible.