If you’re a parent or caregiver, you’ve probably heard about childhood developmental milestones from doctors and teachers or other professionals who work with kids. Everyone who spends time with young children on a regular basis is looking for evidence that their development is on track.

Maybe you’ve already spent a lot of time reading about infant and early childhood development. Or maybe the idea of age-appropriate milestones is new to you. Keeping track of milestones—when there are so many of them to look out for—can feel overwhelming. But monitoring your child’s development—and engaging with them in ways that contribute to their learning and growth—is so important.