(Undated) -- Kids might be more likely to eat their vegetables if they don't know they're healthy. Registered Dietitian Jennifer Willoughby says parents might not want tell their kids about the benefits of fruits and veggies. The study was done by researchers at Northwestern University and the University of Chicago. They had children between the ages of three and five read a book about snacks. The results showed that the children who were not taught about the health benefits of different snacks, ended up eating more of their snack. Researchers say this study can be easily translated to fruits and vegetables.