A "new study" suggests that kids and adults need much more Vitamin D, and have doubled the "suggested requirements" for the vitamin. It can be found in milk and some fish, among other things. While it's briefly mentioned in the article that the best source is sunlight unhampered by sunscreen, it's practically tossed out as dangerous because of the risks of sun exposure. I'm sorry, but people have gotten along just fine going into the sun here and there, without serious detriment. Most of the people who have issues are the ones that stay in the sun to get a tan, or are working outside constantly. When you're exposed to it for very long periods of time as with anything else, you're likely to have issues. But sending your kids outside for 15 minutes here and there on days where it's not 98 degrees outside, generally isn't going to be a major issue. This isn't rocket science. Get outside a little bit here and there. It's not going to kill you!