OAKLAND — A Montclair Elementary School third-grader has entered the world of philanthropy with the establishment of his own nonprofit called Birddayart, donating its proceeds to UCSF Benioff Children’s Hospital Oakland and other charitable institutions.

Arjun Amin creates greeting cards, which he sells for $3 each, and 100 percent of the proceeds go to charity. Amin creates many of his cards by himself, but sometimes guest artists contribute to his cause. Clad in a jacket and bow tie most days, the Piedmont resident has been in business since 2013, when the idea of doing art for philanthropy came to him at the age of 6.

Amin suffered an accident shortly before his fourth birthday, when he was run over by a neighbor’s SUV while drawing outside with sidewalk chalk. Amin’s favorite thing about his subsequent 10-day stay at Children’s Hospital was the playroom, where he would spend hours playing with the toys. Never forgetting their experience at the hospital, the Amin family has made a donation to the hospital every year.

Amin gets a wish list of toys from the hospital and purchases them himself. This year, he even wrote toy manufacturer Valtech, the maker of Manga Tiles, asking for a discount on their products for his cause.

Valtech donated the toys to Children’s Hospital on Amin’s behalf and suggested that Amin donate what he would have spent on toys to charity. Inspired by a report he did on orangutans in the first grade, Amin chose to donate his earnings to the World Wildlife Fund’s orangutan program.

“I feel good about helping the environment. Like millions of others, I help make the planet a better place to live,” he said.

Amin is a student council representative for his class. His favorite school subjects are math and science, especially chemistry. He is interested in being a pilot when he grows up.

Amin is ramping up production for the holiday season. He plans to donate toys again to Children’s Hospital and at press time was just $60 shy of his $200 goal for this year’s donation.

“This year, I will also give money for the development of the hospital and to build more rooms,” Amin said.

“It’s a great playmate,” said Amin’s mom, Ami Desai-Amin, who provides the art supplies and snacks for Amin’s budding venture.

Amin began his career drawing birds but has moved on to other things.

“That’s how artists are. One day, he does only cats; currently, he is in an airplane phase,” Desai-Amin said.

“I get my inspiration from things I see,” Amin said.

Amin’s early work featured birds, after mastering how to draw a hummingbird in his aftercare program. Birddayart’s logo is a hummingbird, which Amin draws on the back of each card.

Amin originally thought about featuring his art on billboards, buses and shopping bags, but his mother has urged him to limit his business to greeting cards for the time being. On his next trip to his parent’s native India, though, his aunt will make coasters, mugs, and bags featuring his work to sell.

“He never thinks of buying anything for himself,” Desai-Amin said. “He reminds me that on the website it says it’s a charity. It gives him a sense of what charity is.”