1. What physical skills develop in the first year? 2. How do two-year-olds interact with one another and express themselves? SELLELE 3. What suggests developmental delays in two-year-olds? 4. What are global delays and what may lead to such delays? 5. How does language develop in early childhood? Critical Thinking Questions 1. How much variation is normal in child development? When might you or a parent become concerned about development? 2. Why is the development of small motor skills so important during the preschool years? 3. How do motor skills develop between ages five and eight?