Myth: My child is mostly inside, so I don't have to worry.
Truth: You may have to, especially on sunny days. Window glass only filters out UVB, so UVA can still penetrate your child's skin if she's standing nearby. "We used to think that only UVB rays were dangerous, but now we know that UVA rays also cause skin cancer," says Parents advisor Jody Alpert Levine, MD, a pediatric dermatologist in New York City. When you're going on a long car ride, put sunscreen on your child's hands, forearms, and face before hitting the road. If her play area or desk is right near a window at home or at school, she should also wear sunscreen to reduce exposure.