You only saw a few seconds of me in that video. Here's the rest.

For years, I was the one who texted first. The birthday money. The “thinking of you.” The “did you get it?” My granddaughter Emma always answered. She loved me. She just never started.

Now she texts me every morning at 7:12. One word. It began with a necklace a stranger in Paris put in my hand.

It's called the Clover Heart: four tiny hearts that click together into a four-leaf clover. $65 for one, or $130 for three. Most grandmothers take three: one for each granddaughter, or one to keep for yourself. Each comes in its own gift box.

Emma was fifteen, and busy in every way fifteen-year-olds are busy. School, friends, a phone that never stopped buzzing. And I knew she loved me. I'd have told anyone who asked.

But when I scrolled up through our texts, it was all my bubbles. “Good luck today!” “Saw this and thought of you.” “Did the money come through?” Her answers were sweet. They were also always answers.

For years my gifts were money, because everyone said that was easiest. And it was. But money is easy to give and easy to forget. It gets spent, and nothing of you stays behind.

Calling more wasn't the answer either. I didn't want to become the grandmother she felt guilty about.

What I wanted wasn't more of her time. I wanted to be the person she thought of first, without anyone having to remind her.

If you've ever typed a text to your granddaughter and deleted it so you wouldn't seem like “too much,” you know exactly what I mean.

That April, my husband and I finally took the trip to Paris we'd been putting off for two years. One afternoon he wanted a nap, so I went for coffee alone, near the Louvre.

At the next table, a woman was pulling something apart in her fingers. Four tiny hearts. Then she pressed them together, and they clicked into a four-leaf clover. Apart. Together. Apart again.

I couldn't stop watching. Finally I leaned over and asked what she was making.

Her name was Elodie Laurent. She told me a gift shouldn't just sit on a neck. It should do something. Something her granddaughter could reach for when she was nervous. Clover for courage. Hearts for love.

Her own grandmother had given her the original forty years earlier. She showed it to me. The metal was worn completely smooth.

I told her about Emma. She listened for a long time. Then she said, “I have one prototype. Take it home.” I tried to pay. She wouldn't let me.

She pulled it apart, clicked it back together, looked up at me and said, “Grammy, it changes.”

That was three years ago. Every morning since, at 7:12, she sends me one word: clover or hearts. It's whichever side she chose to wear that day. Clover when she wants courage. Hearts when she wants love.

Nobody told her to do that. She just reaches for the necklace every morning, and somewhere in that little habit, she started reaching for me.

When she failed her driving test, the first person she called was me. At her eighteenth birthday dinner, she told the whole table the story of her necklace.

I didn't ask for any of it. I just gave her something of mine she wanted to keep close.

A set of three works out to about $43 a necklace. Bought one at a time, three would be $195. In the set, you pay the price of two and the third is free.

• No one is left out. Sisters and cousins each get the same necklace in the same box, and the same story to tell.
• One for you. I wear mine too. When Emma's word arrives at 7:12, I'm touching the same little clover she is. It's the closest I get to sitting beside her.
• One for the next big day. A sixteenth birthday, a graduation, a first apartment. When it comes, the gift is already in its box, ready.

Have a bigger family? Five necklaces are $195, about $39 each.

Every necklace comes in its own gift box, ready to hand over, in silver or gold. And you have 30 days to send it back if it isn't right.

The pendant is four small hearts held together by magnets. Pull gently and they open into a row of hearts. Bring them back and they click into a four-leaf clover. You can feel the snap.

Nothing comes loose and nothing falls off. The hearts stay on the chain. It's one piece, always.

That's the reason it stays on. Most jewelry just hangs there. This gives her hands something to do: before an exam, in a waiting room, on a night she can't sleep. And every time she reaches for it, she's holding something you gave her.

A card gets read once. Money gets spent. This stays with her all day.

Six months after Paris, I wrote to Elodie and asked if she'd ever sell them. She said she wasn't ready. I said I'd help her if she was. That's how Hello Arlo began.

Now other grandmothers write to me every week. Here are a few, in their own words:

Another grandmother told me her granddaughter wore it to every one of her exams last spring and texted her “clover” before each one. She got into her first-choice college. The first person she called was her Grammy.

Notice how often they say “never take off.” That's the whole idea.

I almost didn't give it to Emma for this reason. The last thing I wanted was one more thing for a busy fifteen-year-old to feel guilty about.

But there's no app, no reminder, no rule. Nobody asked Emma to text me. The necklace doesn't make her do anything. It just sits at her collarbone, a little piece of you.

Some girls send a word every morning. Some send one before a big day. Some never mention it, and you notice it on her in every photo. Each of those is a granddaughter carrying you with her.

I can't promise your phone will light up at 7:12. Nobody honest could. What I can promise is this: if she doesn't wear it, you get your money back.

Here's how I'd do it. Give it to her. Watch her open the box and pull the clover apart for the first time. Then wait and see.

If she doesn't wear it, send it back within 30 days for a full refund. The only thing you risk is a little time.

Or you can keep going the way things are. Keep texting first. Keep sending the birthday money. She'll keep answering kindly, and there's nothing wrong with any of it.

Or picture the other way it can go. A month from now, it's still on her. She reaches for it before a test without thinking. And one morning, maybe, your phone lights up with one word before you've had your coffee.

$65 for one. $130 for three, each in its own gift box.

Sometimes it does. But sometimes the kindest thing you can do is give her something of yours to reach for, and let her come to you in her own time.

Four little hearts did that for Emma and me. I hope they do it for you.

With love,
Emma's Grammy, founder of Hello Arlo