New research shows kids in the U.S. continue to gain too much weight.
The sharpest increase was among children ages 2 to 5 years old, according to researchers.
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Obesity remains the highest among Hispanic and African American children.
Pediatricians say one thing parents can do is to have only healthy snacks inside the house.
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Kids will eventually eat the healthy snacks, which can promote better quality of life in the long run, the study shows.