Second-Year Milestones: What to Expect

The wobbly first-birthday walker and the opinionated almost-two-year-old are, somehow, the same small person. Here's a broad look at everything that tends to shift in between.

If the first year is largely about a baby learning what their body can do, the second year is often about a toddler discovering who they are — and testing that, loudly, at every possible opportunity. It's a big, sometimes exhausting stretch of change, and knowing the general shape of it can make the wilder moments feel a little less like chaos and a little more like exactly what's supposed to be happening.

Movement: from walking to running (and climbing everything)

Many toddlers are walking independently by sometime around their first birthday, though plenty walk a bit earlier or later and both are entirely normal. Over the course of the second year, that wobbly first walk tends to turn into something much more confident. Many toddlers, somewhere across this year, begin:

• Walking more steadily, then running, even if it looks a little stiff-legged at first.
• Climbing onto furniture, up stairs, and into places that make parents' hearts skip a beat — this is a very common and very normal push toward independence.
• Kicking or throwing a ball, with balance and coordination improving gradually across the year.
• Beginning to try stairs, often two feet per step at first, holding a rail or hand for support.

Communication: from a handful of words to short phrases

Language often makes a noticeable leap during the second year, though the pace varies enormously from toddler to toddler. It's common to see a small but growing vocabulary expand steadily, understanding continuing to outpace speaking by a wide margin, and simple two-word combinations ("more juice," "up please") appearing for many toddlers sometime in the back half of this year. Pointing, gesturing, and using sounds purposefully all count as real communication too, even before clear words arrive.

Independence and emotions: the "me do it" era

This is often the year a toddler's personality becomes unmistakably, sometimes hilariously, their own. Common patterns during this stretch include a strong new drive to do things independently (getting dressed, feeding themselves, choosing which cup), clearer preferences and opinions about, well, everything, and — right alongside that — bigger emotional reactions when those preferences don't get met. This is also frequently when parallel play starts to show up, with toddlers playing near other children even if not quite fully with them yet.

Why the range is so wide here, too

Perhaps more than any other stretch, the second year shows just how individual development really is. A toddler's temperament, birth order, how much older siblings talk to them, and simple personality all shape the pace and order in which these changes show up. A toddler who's an early talker and a later walker, or the reverse, is not unusual at all — these skill areas develop somewhat independently of each other.

Somewhere between the first unsteady steps and the toddler who now has strong opinions about socks, an entire small person has been quietly taking shape. It's a lot to keep up with — but it's also, in its own chaotic way, one of the most fun years to watch.

This guide offers general education, not individualized medical advice or diagnosis. For anything specific to you and your baby, please talk to your IBCLC, pediatrician, or doctor.