It won't cost you any extra money, and only takes a few seconds.

Taking the time to write your children a note in their lunchbox isn't new—but Meghan Markle just reminded us all of an easy way to make fruit more exciting for our kids by sharing a hack that went viral in December.

On Friday, the Duchess of Sussex spent time working with British charity organization One25, a program designed to help at-risk women in the United Kingdom—particularly those facing issues like poverty, domestic violence, and homelessness. Alongside Prince Harry, Markle took time to make a gesture of support by packing lunches for the charity organization and writing notes to the women who would later receive them.

But Markle's notes of support weren't issued on formal royal letterhead, as one might expect—she simply took a black marker and wrote heartfelt affirmations directly onto banana peels.

Markle's visit to Bristol has since gone viral, thanks to the lunch-packing hack. Social media users have been quick to point out that this isn't the first time that the adorable hack has made headlines—last year, a cafeteria employee in Virginia went viral for writing inspiring messages on fruit each day for her students.

Markle, who will soon welcome her first child later this spring, chose simple phrases like, "You are brave!" and "You are special!,” writing bold letters directly onto the fruit. While a paper note may have been gone unnoticed in a lunch bag stuffed with other items, writing a note directly on the fruit's skin is certainly attention-grabbing (and would be a great tactic for kids at lunchtime!).

More on how the royals inspire healthy eating:

If you want to replicate this idea in your own kids’ lunchboxes, bananas are a good choice—they pack many nutrients, including potassium and magnesium, into one serving with just 100 calories and 14g of naturally occurring sugars. They're also high in fiber, and since their skins aren't porous, you won’t impact the fruit's flesh.

If your kid doesn’t like bananas, you could always write a message on a zip-top bag before you slip in their sandwich or snacks.