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Three Years Strong - Keep reading for a look at how Let's Move!, First Lady Michelle Obama's child obesity initiative, has expanded its partnerships and helped kids stay healthy over the last year. —Britt Middleton (Photo: Barry Brecheisen/Getty Images for Nike)

Photo By Photo: Barry Brecheisen/Getty Images for Nike

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Tasty Travels - Mrs. Obama is currently on the road to support the campaign's third anniversary. On Thursday, she visited 400 children at Eastside-Northside Elementary Schools in Clinton, Mississippi, where she and Rachael Ray hosted the first Let's Move! Cafeteria Cook-off. (Photo: Courtesy of Let's Move)

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All-Star Workout - Also on Feb. 28, the first lady got down with Serena Williams, U.S. Olympic gymnast Gabby Douglas and other sports greats for an afternoon workout with students at a Let's Move event in Chicago. According to the Let's Move campaign, nearly 30 percent of children in America are overweight or obese, with the number spiking to 40 percent in African-American and Latino communities. (Photo: Barry Brecheisen/Getty Images for Nike) 

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Making Healthy Food More Accessible - In January 2011 Walmart pledged to reformulate its store brand of packaged foods by cutting sodium 25 percent and removing industrially produced trans fats by 2015. Over the past three years, Walmart, Walgreens and several regional grocery stores have pledged to build or expand 1,500 stores in communities with limited or no access to healthy food. (Photo: Spencer Platt/Getty Images)

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Staying Informed - In its partnership with Let's Move!, the American Beverage Association, which represents PepsiCo and Coca-Cola, now displays calorie labels on the front of soft drink products. (Photo: Justin Sullivan/Getty Images)

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Smarter Choices - In 2011, Darden Restaurants, whose chains include Olive Garden, Red Lobster and LongHorn Steakhouse, said it would cut calories and sodium in all meals by 10 percent by 2016, and by 20 percent by 2021. Additionally, the company now offers a side of fruit or vegetables and glass of 1 percent milk with its kids' meals. (Photo: REUTERS/Fred Prouser /Landov)

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Top Chefs - Last August Mrs. Obama hosted the first Kids’ State Dinner in Washington, celebrating healthy recipes created by children. Fifty-four young chefs from around the country tasted some of their creations at a luncheon held at the White House. (Photo: Alex Wong/Getty Images)

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Getting Fit - In the past year the President’s Council on Fitness, Sports and Nutrition has updated the President’s Challenge Youth Fitness Test, a voluntary, school-based fitness assessment that tracks students' fitness levels and helps them progress over time. The program helps promote active lifestyles and will be implemented in 25 percent of U.S. schools by the end of 2013 and 90 percent of schools by 2018. (PHOTO: HELEN H. RICHARDSON)

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Serving Up Fresh Fare - One major milestone of the Let's Move! initiative has been the Salad Bars to Schools program. Started it 2010, it has delivered more than 1,600 salad bars to schools in the past year and provided fresh fruits and vegetables to more than 800,000 children.  (Photo: Tim Boyle/Getty Images)

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Disney Takes a Stand - Last summer Disney announced that by 2015 it would require all food and beverage products advertised on its television networks, online websites and at its theme parks to align with federal standards promoting healthier food choices by limiting calories, sugar, sodium and saturated fat. (Photo: Chip Somodevilla/Getty Images)

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Protecting Military Families - For the first time in two decades, the U.S. Department of Defense has updated its nutritional standards for fresh fruits, vegetables and other healthy choices for the $4.65 billion worth of food purchased for our troops and their families each year. (Photo: Commercial Appeal /Landov)