 Throughout this period (18–30 months), children become more adept and need fewer cues to engage in helping behavior.However, helping behavior at this age is already dependent on the cost of helping (e.g., they are less likely to give the adult their own blanket) and the recipient of the help (e.g., children are more likely to help and show concern for caregivers than strangers or peers).Between 3 and 6 months old, infants begin engaging in simple back-and-forth exchanges, often with their caregivers.