I was rummaging in the hall closet for a spare lightbulb when an old lunchbox slid off the top shelf and clattered onto my shoes.

Inside were two marbles, a dried four-leaf clover pressed in wax paper, and a crayon drawing of a lopsided house with smoke that always looked like question marks.

The smell hit first, that mix of dust and paper and something sweet, and then the memories lined up like polite guests waiting to be let in. I could hear the school bell from my old elementary, feel the rubbery floor of the gym, and taste the milk that never got quite cold enough.

At 70-something, these flashes are more than nostalgia. They are proof that the mind is still hauling its weight.

I am not a doctor, and I will not pretend to have it all figured out, but I have learned this: when certain childhood memories stay vivid, it is a quiet sign your brain is keeping the lights on in all the right rooms.

If you can still call up the kinds of memories below with clarity and detail, your mind is stronger than most in their 70s. Not perfect. Not unbreakable. Strong.

1. The map of your first home

Close your eyes and walk it. The front step with the crack. The door that stuck in July. Where the light switch lived and which one did the porch. The short hall to the kitchen and the exact corner where the linoleum curled. If you can tour that floor plan without bumping into the ottoman you have not seen in fifty years, your spatial memory is working beautifully.

I can still trace the route from my bed to the fridge at midnight, counting the boards that creaked and the one that did not. I remember where the winter boots sat on an old towel and the spot where the dog would flop to catch afternoon sun. That kind of place memory is more than a warm feeling. It is your hippocampus showing off.

Try this: sketch the floor plan on a scrap of paper, labels and all. Then call a sibling or an old friend and compare maps. The debate about where the phone hung will make the picture even sharper.

2. Your first phone number and address

Ask your mouth to say the numbers without thinking. If they tumble out like a rhyme, that is semantic memory doing good work. The landline we dialed as kids is often welded to our sense of home. I still know ours and can hear the slow clatter of the rotary and the way the cord insisted on knotting itself when you tried to stretch it into the hallway for privacy.

Bonus points if you can recall whose handwriting lived on the envelope, how the envelope felt, and what the mailbox looked like on the street. Tying numbers to images and textures strengthens the recall loop.

Practice: write down five numbers from childhood that mattered – phone, address, locker combination, jersey number, library card – and put one sensory note next to each. Numbers stick best when they hold hands with a smell or a sound.

3. The names of your grade school teachers in order

Mrs. Carlisle in first grade with the perfume that smelled like lemons. Mr. Diaz in second, who taught us the word stalactite. Miss Harper in third with the neatest chalk lines I have ever seen. If you can put your teachers in sequence and slap one detail on each, your temporal memory is lively.

Memory likes a chain. The order of people, places, and years keeps other facts from slipping. When I think of my fourth-grade teacher I can also hear the whirr of the filmstrip machine and feel the prickle of the corduroy chair where we took turns reading. That web of details is your brain cross-referencing in real time.

Practice: say the names out loud, then add a detail you could not have made up today. The hum of the aquarium pump. The way Friday spelling tests sounded when thirty pencils started at once.

4. The route you took to school or a friend’s house

Can you bike it in your head. Past the corner store that smelled like bubblegum and oil. Left at the oak that dropped leaves like gold coins. Over the cracked sidewalk square that lifted in winter. If you can string landmarks into a path and feel your body roll the turns, you are flexing spatial mapping and procedural memory at once.

I still remember where I would coast and where I would stand on the pedals, where the mean dog barked and where Mrs. O’Leary waved with a hose in her hand. That is not just seeing. That is moving through the scene in a way the mind loves to keep.

Practice: take a slow walk in your current neighborhood and name five landmarks in order. Later, sit with tea and replay the walk. Your brain is like a friendly librarian – it files what you use.

5. The rules of the games you played outside

Red Rover, four square, stickball, kick the can. If you can teach those rules to a kid without looking them up, your procedural memory has good posture. I remember how we drew the chalk grid, where the boundaries bent around the storm drain, and the unspoken law that three do-overs meant the argument was over.

Games anchor movement, strategy, and community all in one. They also carry the social pieces you might not notice at first. Who was fair. Who bent rules. Who could make a disappointed kid laugh again with a silly voice and one more round.

Practice: teach one of your games to a grandchild, a neighbor kid, or the friend who never learned it. Saying it out loud wakes up circuits that reading does not.

6. The steps and the taste of a favorite childhood dish

If you can cook your mother’s pancakes without checking a card or your grandfather’s stew from muscle memory, that is procedural and sensory memory braided together. I can still make grilled cheese the way my mother taught me – medium heat, lid on, a peek at two minutes, a flip when the kitchen starts to smell like toast. The sound of the pan, the squeak of the loose spatula screw, the little plume of steam when you lift the lid – these details are anchors.

Taste and smell are backstage champs. They make the whole room appear. I can close my eyes, smell cinnamon on hot butter, and suddenly I am eight with a plate that is too hot to touch. That is not sentiment. That is good wiring.

Practice: cook one childhood dish from memory, writing the steps as you go. You will be surprised how much your hands know.

7. The feel and sound of your favorite place

The library with the papery hush. The bowling alley that smelled like wax, leather, and soda syrup. The skating rink with that mix of cold air and metal. If you can summon a place and its soundtrack, your episodic memory is a sturdy bridge.

For me it is the summer lake and the dock that creaked like it had opinions. The water had a tang of iron after rain. The lifeguard’s whistle cut the air in a way that always made you look up. If you can put yourself in that place and look around, your mind is stitching sensory threads into a strong rope.

Practice: pick one place and write five senses for it – sight, sound, smell, touch, and even taste if one fits. Say them out loud. It locks them in.

8. The first music you loved and where you heard it

Play one song from your childhood and watch what arrives. If you can sing the chorus and also tell me which room you were in or who sat next to you, that is your auditory memory pulling friends from other departments. I remember the Beatles warbling from a transistor radio while my father washed the car, the hose sliding over concrete like a snake, the smell of suds and sunshine.

Music is a time machine with a very simple control panel. You push play, and 1971 walks in with a grin. That you can still launch that trip matters.

Practice: listen to a full album all the way through without skipping. Then jot three moments that appeared uninvited. The writing part snaps the picture.

9. One small moment that still carries a big feeling

Not the graduations. The tiny things. The way your stomach fell on the first drop of the roller coaster followed by the laugh that said you were safe. The first time you stayed home alone and every household sound seemed to have a story. The scrape of a knee and the sting that melted when someone washed the grit away and said, there now.

If you can pair a small scene with a clear feeling, your emotional memory is lively and useful. It helps you recognize today’s feelings faster and treat them with the same good medicine. I still remember the quiet pride of being trusted with the grocery list and the nickel change. It fits in my pocket today when I want to offer that same trust to a grandchild.

Practice: write three two-sentence vignettes. One scene, one feeling. Short on purpose. The point is to anchor, not to perform.

Two quick stories to show you how this looks in the wild.

One afternoon last fall, I taught my grandson how to play marbles on the porch. The rules came back like a patient friend. Circle chalked on the wood. Shooter marble kept warm in the palm. Knuckle down, flick, and do not cross the line.

As I talked, I could see my own father’s hands doing the same thing. My grandson missed, then hit, then whooped in a voice that pulled up a summer I thought I had lost. After he went home, I drew the circle again just to make sure the path stayed open. It did.

Another night the power blinked out in a storm. We lit candles and played cards by the window. The house felt like a boat, and the quiet grew thick enough to notice.

I could smell the candle wax and hear the wind and the timer in the kitchen ticking away at something we were not cooking. I slept like a boy that night, not because I was young, but because the memory of other quiet nights stood behind the current one and held it steady.

If you can still do any of this, take heart. Your brain is not a filing cabinet that gets emptier. It is a town with streets you know by foot. The more often you walk them, the more lights stay on.

A few easy ways to keep those lights bright:

• Tell one short story a week to someone younger. Do not preach. Just hand them a small scene that matters to you.
• Teach a game or a recipe from your childhood. Let your hands talk.
• Keep a pocket notebook of five smells you still love. Take a sniff when the day feels thin.
• Label three old photos with names, places, and one detail. Your future self will be grateful for the notes.
• Walk an old route in your head while you do the dishes. Surprise yourself with how much you remember.

I am the first to admit I do not know everything about what keeps a mind strong. But I know this: when I can still find the creaky step in the dark, smell the library from a single paper page, or name the third-grade teacher who kept a goldfish that never seemed to die, I feel sturdy. Not because the past is better, but because the bridge between then and now is holding.

So pull down the lunchbox, the shoebox, the old map in your head. Stir the memory pot with slow circles. Invite a younger person to taste and see. Strength is not only about recall. It is about sharing what you remember in ways that make the present warmer. If you can still do that, you are doing very well indeed.