The purpose of this 2005 investigation was to examine whether painting playgrounds with multicolored markings would increase the percent of recess time spent in moderate to vigorous physical activity (MVPA) and vigorous physical activity (VPA) in Liverpool girls and boys. Multicolor playground markings can be a low-cost method of increasing children’s daily physical activity levels in the short term. If these increases were sustained, then school playgrounds with multicolor markings would make a valuable contribution to physical activity recommendations for young people.