The document summarizes developmental milestones for toddlers aged 2 to 3 years old across various domains. Key points include: - Weight gain slows and height increases more rapidly, with average heights of 82.5-85cm and weights of 11.8-12.7kg. - Motor skills progress from walking without support to jumping, kicking balls, and climbing on furniture. Language development increases from 2-6 words to 300 words and use of pronouns. Cognitive abilities transition from sensorimotor thinking to preoperational stage with symbolic thought and imitation.