Here's how you can send your letter to Santa and help a good cause

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Michael, 6, mails a letter to Santa with the help of Fresno Firefighters at Macy's Believe Launch at Macy's River Park on Wednesday, Nov. 8, 2017 in Fresno, Calif.
Tomas Ovalle/AP Images for Macy's

Here's an easy way to spread Christmas cheer: Write a letter to Santa for charity.

Now through Dec. 24, when you write a letter to Santa and send it through Macy's Believe campaign, the department store will donate $1 to the Make-A-Wish Foundation.

To participate, write a physical letter when you visit a Macy's store or go to the Believe website to write your letter online. It doesn't have to be a wish; you can also write a message of hope and Christmas cheer.

The campaign is inspired by the story of 8-year-old Virginia O'Hanlon, who wrote a letter to the New York Sun newspaper in 1897 asking if Santa exists. The editor's reply began, "Yes, Virginia, there is a Santa Claus. He exists as certainly as love and generosity and devotion exist."

Make-A-Wish uses the money to grant wishes to kids with life-threatening medical conditions.