There’s something about the season of starting childcare. A baby a little too small for their car seat, a toddler clutching a favorite toy at drop-off, that mix of excitement and nerves in everyone’s eyes (yours included). Wherever your child is starting this year, one thing remains true: these early years are some of the most important they will ever experience.
What we want every family who walks through our doors to know is just how much is happening inside their child’s brain during these early months and years. Not someday. Not “when they’re old enough to remember things.” Right now, in real time, while you’re navigating drop-off and trying to trust the process.
The science on this is genuinely fascinating. And we think every parent deserves to understand it.
Your Baby Is Building Memory Long Before You’d Expect
Here’s something that surprises many of the families we work with: even though children generally can’t form memories they’ll consciously recall before age 3 or 4, babies actually start using the hippocampus, the brain’s memory center, as early as 3 months old. That’s still the newborn fog phase for most families.
What this tells researchers is that babies are absorbing and processing far more than we give them credit for, and long before they can tell us about it. The relationships, routines, and care they experience in those early months are shaping things under the surface.
And here’s the part that eases a lot of the guilt we hear from parents about starting childcare: for babies under a year old, it’s likely not the “educational” component of care that matters most. It’s the stability. Consistent caregivers, predictable routines, and a calm, nurturing environment seem to benefit babies more than any structured lesson ever could.
And there’s a ripple effect, too: childcare enrollment has been shown to reduce maternal stress, which creates its own positive outcomes for the whole family, baby included.
The Toddler Brain Is Doing Something Extraordinary
If infancy felt like a lot, toddlerhood takes it even further. A 2-year-old’s brain is still much smaller than an adult’s, but it actually has 50% more synapses than ours do. Fifty percent more connections, packed into that tiny head that’s currently negotiating over which cup is acceptable at snack time.
This makes ages 18 to 36 months an important window for language, social-emotional development, and early math skills, the building blocks that go on to predict how ready a child is for school down the road. It’s one of the reasons we design our toddler classrooms the way we do, with rich language environments, open-ended materials, and caregivers who are trained to follow a child’s curiosity rather than redirect it.
One study out of Japan even found that enrolling infants and toddlers in quality care before age three was linked to real improvements in social, motor, and problem-solving skills. So all that collaborative play, the sharing struggles, the toddler negotiation happening in our classrooms every day? It’s doing more than just making for good stories at pickup.
By Three, the Foundation Is Largely in Place
By age 3, a child’s brain has already reached about 80% of its adult size. During these early years, children are forming over 1 million new neural connections every single second. That number still gives us pause every time we say it out loud.
What the research also shows is that the quality of interaction matters just as much as the environment itself. Preschoolers who experienced more frequent, warm, and responsive interactions with their caregivers showed measurable gains in both academic and social skills. And enrolling children in quality preschool at age 3 or 4 has been shown to support long-term cognitive development well beyond those early years.
This is why we invest so deeply in our teachers. Not just in training, but in the kind of culture that allows them to show up for children with genuine warmth and presence every single day.
What This Means for Your Family
We share all of this not to add to the weight of parenting decisions. We know there’s already plenty of that. We share it because we believe families deserve to understand what is actually happening during these years, and why the care environment your child is in right now genuinely matters.
At Little Sunshine’s Playhouse, our Reggio Emilia-inspired approach is built around exactly what this research points to: consistent, attentive caregivers, environments designed to support curiosity, and a deep belief that these early years are not a waiting room before real learning begins.
We would love to show you what that looks like. Schedule a private tour at your nearest Little Sunshine’s Playhouse location, and come see the home away from home your child has been waiting for.
