Seven-year-old boy Quinn Callender had raised over US $50,000 after launching a lemonade stand to help his sick best friend undergo a life-changing operation that could help him finally be able to walk.

Brayden Grozdanich, who suffers from cerebral palsy, endures excruciating physiotherapy every day to help him walk but undergoing a US$20,000-worth surgery in the United States could allow him to walk without braces.

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After finding out that his friend needs money to get better, the kind-hearted Quinn from Maple Ridge, British Columbia took the initiative to help by opening up a lemonade stand outside a grocery store with the help of his parents.

"When I got home, I wanted to tell my mommy and daddy that I wanted to do a lemonade stand to help raise money to help him," Quinn told the Daily Mail in an interview.

Wearing shirts inscribed with the slogan "When life gives you lemons, make lemonade," the boys manned the lemonade stand on Sunday and it became a huge hit.

As support to her son's noble gesture, Quinn's mother, Heather Roney  started an online crowd funding campaign in YouCaring.com she entitled "My Buddy Brayden" where she posted her son's moving solicitation letter with a photo of the two boys and their lemonade stand.

After sharing the link on her Facebook page, Roney's friends took notice of the campaign and spread the word resulting to over 500 donations that raised up to US $53,000, breaking Quinn's initial goal by more than US 30,000, Yahoo News reported on Wednesday.

The fundraiser is set to go on until the end of the month.

Tagscerebral palsy, lemonade stand