It’s always surprising (and awesome) when someone does a random act of kindness, like buying you a cup of coffee when you're short on cash or helping to unload your groceries into your car when your hands are full. But doing it for other people feels straight-up amazing.

Jennifer Garner is partnering up with Walmart to encourage people to do their own acts of kindness and share them on social media. It’s called the #SparkKindness campaign, and Garner plans to showcase what people share on her own social media pages to (hopefully) help encourage people to do the same.

Garner is doing it, too. She shared on Instagram Wednesday that she and several volunteers cleaned up the grounds at a school in California and planted a small garden. “I can’t tell you how great it felt to leave behind a gathering place for a community I know can use a little love,” she wrote in the caption.

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Everyone knows that acts of kindness make us stronger and create a true sense of community. I’m excited to #SparkKindness with Walmart, which will have me on the hunt for random acts of kindness-big and small-every day. . My first (very exciting, very happy) project with @walmart took place at a school in Alpaugh, CA. I had visited @savethechildren’s literacy, numeracy, psycho social programs at this K-12 school, and had seen its value to the community. We rounded up Walmart associates and local volunteers and together-we cleaned up the grounds and planted a small garden. I can’t tell you how great it felt to leave behind a gathering place for a community I know can use a little love. . As part of the effort Walmart is hoping you will join us and perform, notice and share acts of kindness with them-and the world-using #SparkKindness. Goodness spreads and a little kindness goes a long way. I can’t wait to see! ♥️ #kindnessiscontagious #sponsor

A post shared by Jennifer Garner (@jennifer.garner) on Jun 12, 2019 at 5:38am PDT

“These random acts of kindness are happening all around us, all the time, everywhere,” Garner told People. “The smallest acts-picking up trash at a local park, volunteering at a shelter, buying a cup of coffee for someone who needs it-make the world a happier, more gentle place.”

The actress says she hopes her partnership will “put a twinkle in someone’s eye and help be the nudge we sometimes need to step outside ourselves and change a day for the better. Kindness is contagious, truly. I can’t wait to see what happens.”

The campaign ~just~ launched, but there are already some people who are participating:

So, next time you see someone who needs a hand, you know what to do.