Why mothers wonder their aggressive toddlers suddenly changed? Traditional studies since the 1940s have explained a strong connection between language problems and physical aggression in toddlers. However, a new large-scale study followed over 2,000 toddlers has concluded that, after reaching the 41-month mark, this previously observed link vanishes. Did your toddlers character change at 41 months? On next, why every mother's quiet the room for their toddler?