Which developmental milestone is typically expected by age 3?

Speaking in full sentences is a developmental milestone that is expected by age 3. By this age, children typically start to combine two or three words together to form simple sentences, indicating their growing language skills and cognitive development. They can express their thoughts and needs more clearly, which is an essential aspect of social interaction and communication. The complexity of their language continues to increase as they grow, reflecting their understanding of grammar and vocabulary.

While potty training is often a goal for children around this age, there is a significant variation in when children achieve this milestone depending on individual readiness. Walking independently is usually accomplished by age 1, and riding a bicycle typically does not occur until at least age 4 or 5, as it requires additional coordination and balance skills. Therefore, speaking in full sentences is the developmental milestone most commonly associated with age 3.