Toddler Developmental Milestones, 15-18: Introduction (3:16); Areas of Development (2:26); Cognitive Milestones (1:23); Language and Communication Milestones (1:59); Social and Emotional Milestones (3:55); Physical Milestones (1:42); When to Call your Medical Provider (0:48); 15-18 Month Milestone Recap (2:04); Toddler Developmental Milestones, 15-18: Conclusion (1:03); Credits: Toddler Developmental Milestones 15-18 (0:07);