Saturday is “Lemonaide Day” in Alexandria. (Katherine Frey/The Washington Post)

On the so-called “Lemonaide Day,” local children will set up lemonade stands to raise money for organizations that support at-risk kids.

The annual tradition was born in the wake of the Sept. 11, 2001 attacks. Three local children saw their peers across the country setting up lemonade stands to raise money and were inspired to start their own organization, Kids Helping Kids.

For the last 10 years, the teen-run nonprofit has held Lemonaide Days, raising more than $75,000 for charities including Alexandria Police Youth Camp, Network Preschool, Grandma Rita’s Kids, Coats for Kids and The Campagna Center.