The aim of this study was to analytically evaluate the daily intake of total polyphenols, β-carotene, and vitamin C by 10- to 12-year-old children. Twenty four-hour dietary recalls were collected in spring and autumn 2006 from students in Krakow and Skawina (Malopolska region, Poland). The content of vitamin C, polyphenols, and β-carotene was determined in reconstructed daily diets. Statistical analysis did not show any significant differences between the mean intake of measured compounds according to school location, gender, or season. Diets of children contained adequate amounts of polyphenols in relation to the recommended values. Intake of β -carotene usually exceeded the recommended retinol equivalent; in contrast, vitamin C did not meet requirements. Increased consumption of fruits and vegetables rich in vitamin C is recommended.