A group of mothers and infants celebrate a recent graduation from the Harlem Children's Zone Baby College program. Marty Lipp/Courtesy of Harlem Children's Zone hide caption

itoggle caption Marty Lipp/Courtesy of Harlem Children's Zone

Back in 2012, Silver Diner — a fast-casual restaurant chain in Maryland and Virginia — completely overhauled its children's menu. Those changes helped dramatically improve the healthfulness of kids' meals ordered, a new study finds. Ron Cogswell/Flickr hide caption

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The number of women buying, selling and sharing breast milk is growing rapidly. But it can be a risky purchase, scientists say, because a mom can't tell by looking at the milk whether it's safe and nutritious for her baby. iStockphoto hide caption

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Frito-Lay reformulated Flamin' Hot Cheetos, a perennial favorite among school kids, to meet new federal "Smart Snack" rules for schools. Meredith Rizzo/NPR hide caption

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Both James Eversull (left) and Pat Patchell were treated with experimental chemotherapy and radiation for leukemia as children in the 1960s. Together, they're now some of the country's oldest leukemia survivors.. Courtesy of James Eversull; Courtesy of Pat Patchell hide caption

itoggle caption Courtesy of James Eversull; Courtesy of Pat Patchell

Brazilian mothers participate in a demonstration in 2011 for the right to breastfeed in public, in Sao Paulo, Brazil. Eduardo Anizelli/STF/LatinContent/Getty Images hide caption

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Truvada can dramatically reduce the risk of HIV infection when taken as a preventative medicine — if taken every day. Studies are underway to determine if young people are likely to take the pill consistently. Justin Sullivan/Getty Images hide caption

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Having a narcissistic parent doesn't mean you're going to turn out that way, too. GraphicaArtis/Corbis hide caption

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Kristen Caminiti cuddles her son Connor while doctors stitch her up following a C-section. Courtesy of Kristen DeBoy Caminiti hide caption

itoggle caption Courtesy of Kristen DeBoy Caminiti

Uzuri Pease-Greene, right, leads a walk through the public housing complex in the Potrero Hill neighborhood of San Francisco where her family lives. She is working to have the old buildings replaced. Talia Herman for NPR hide caption

itoggle caption Talia Herman for NPR
Hanna Barczyk for NPR

Most parents have a favorite child, psychologists say, even if they try to be fair. Hero Images Inc./Corbis hide caption

itoggle caption Hero Images Inc./Corbis