Several studies undertaken in the United States from 2000 to 2007, said that good daycare for non-infants is not harmful. In some cases, good daycare can provide different experiences than parental care does, especially when children reach two and are ready to interact with other children. Bad daycare puts the child at physical, emotional and attachment risk. Higher quality care was associated with better outcomes. Children in higher quality childcare had somewhat better language and cognitive development during the first 4½ years of life than those in lower quality care. They were also somewhat more cooperative than those who experienced lower quality care during the first 3 years of life.