The first time we hold them, they fit into the corner of our arms with room to spare. Their impossibly small pink toes fit neatly in our eyelids as we kiss their wiggling feet.

We lower their grocery-sack-sized bodies gently into their cribs. During the day we bring food to their toothless mouths, and their bodies process the food as they take what they need and leave the rest for us to clean and remove.

Suddenly they are coasting, looking into the side of a couch, a chair or our legs, standing for the first time. Amid the cheers and squeals, they fall and we rush to the floor near them and congratulate them. Before long we’re bending down, gently holding tiny hands engulfed in our oven-mitt-sized palms.

From their first walking steps, they progress to trotting. It’s a wonderful yet terrible transition, as their developing minds can’t process dangers at the same rate that their feet propel them. We keep up or race ahead, making sure they don’t step off a curb until all movement on the street has stopped.

They no longer want to sit in the car seat. They arch backs that are shorter than our arms, making it impossible to buckle them in. We distract them enough to close the clasps, run to the front seat and bring the car to a high enough speed that they sleep.

We take them roller skating, skiing or ice skating. We start them early so they’ll become naturals. Brilliant idea, except that they need us to put our hands under their armpits to keep them upright. After a time far too short for our kids’ liking, our backs scream to stop. We can’t bend down or our spines will go on strike. At that point, these small people want hot chocolate or the chance to try skiing, snowboarding or rollerblading on their own.

We stand on a field, tossing a ball lightly near their gloves. They throw the ball back in our general direction, discouraged that they haven’t discovered the magic of a catch. We get down on one knee, look them in the eye, pull up their small chins and smile, hoping we can teach the mechanics of throwing before they become too upset to keep trying.

We protect their heads from colliding with the tops of tables, reach for glasses from the cabinet, and help them into the seats at restaurants where their feet dangle far from the floor.

Pretty soon, they want to ride a bike. We promise to hold on but our backs, yet again, have other ideas. They shout at us for letting go or, maybe, they decide they want to do it on their own because they saw Timmy down the street on his bike.

Their faces, arms and legs get longer, they pick up speed everywhere they go and, before long, their heads are above the level of the kitchen table. They reach down to pet the neighbors’ big dog, and they sit in restaurant chairs with enormous feet that rest on the floor and which we wouldn’t dare put anywhere near our eyelids.

We no longer have to bend our necks to kiss the tops of their heads. In fact, with their braces gleaming in the sun, they stare or glare from under the long hair of adolescence directly into our eyes. Pretty soon we hope, as we go to sleep each night, they will be taller than we are.

Wonderful as that moment is, maybe — just for an instant — we remember that the head perched atop this growing body is the same one that fit so snugly into our arms all those years ago.