Health and Fitness What Preschoolers Know About Healthy Eating by Gary Kopycinski on November 12, 2013 Gary Kopycinski Author More in Health and Fitness: On Hantavirus, Park Forest Officials Urge Caution May 18, 2026 Rep. Kelly Condemns FDA Approval of Flavored E-Cigarettes May 6, 2026 Park Forest Aligns With Illinois Guidance on Childhood Vaccines Amid Federal Changes January 11, 2026 ANN ARBOR–(ENEWSPF)–November 12, 2013. When you hand a preschooler a donut, does she know it’s junk food? The answer is yes, says University of Michigan researcher Kristen Harrison.