Marco Castillo narrates the new research regarding field behaviours in children using different kinds of experiments. The main goal of the experiments is to uncover the differences in behaviours relevant to motivation and individual preferences. The experiments range from negative childhood experiences and risk aversion to rationality risks and their connection to attitudes and misbehaviours. Most estimates in applied macroeconomics assume that there is homogeneity in preferences and behaviours in general. These assumptions are what Marco wants to debunk by proving individual differences in choice. Marco concludes that domestic violence affects negatively the development of younglings. But not all is negative, with positive parental investment children can develop in a healthy way and have a rich and fulfilling life.