The whole family has been captivated lately by Ellie’s newest trick. As she prepares to trade crawling for the brave new world of walking, we are bracing for an onslaught of milestones. But for now, we are obsessed with the “Head Wag.”

It started a few weeks ago: a rhythmic, sideways nod that defies easy explanation. To the limited comprehension of the adults in the room, the cause remains a mystery. However, Ellie is a generous performer. If we provide a bit of encouragement—usually by making fools of ourselves with our own awkward head wags—she rewards us with an encore. Sometimes, just a sideways glance and a smile are enough to trigger that little face into motion.

In some cases, the “why” is obvious. In others, it’s a total enigma. Is she defragmenting her hard drive? Is she locking a memory in a little tighter, giving it a shake to ensure it doesn’t leak out of her ears?

That serpentine tongue is occasionally hard to explain, but I find myself wondering about the construction project currently happening behind her eyes. What steps does a baby’s brain take to become the adult brain that has to keep her entertained for the rest of her life?

This quirk isn’t happening in a vacuum. She is zooming through her first year, leaving the adults in a state of perpetual amazement. Our days are filled with a chorus of, “Where did that come from?” and “Did her mom do that?”

Our grandparenting journey will only get more crowded as the family grows. My hope is to catalog these individual quirks while holding onto the memories of what they all share. Perhaps, eventually, we’ll realize they aren’t “quirks” at all—just the universal language of babies being babies. My front-row seat might not be as high-octane as a Saturday at the hockey rink watching our boys, but it keeps me absolutely riveted to the adventure.