Article will continue after advertisement

An 8-year-old boy is literally turning lemons into lemonade as part of his therapy at a Nebraska rehabilitation hospital, where he’s recovering from brain surgery.

Ulises Ornelas of Garden City, Kansas suffers from hemangiama cavernoma, which causes a tangled mass of blood vessels to form on his brain, KETV reports. He’s been receiving therapy for his condition at Madonna Rehabilitation Hospitals in Lincoln, Nebraska since undergoing surgery to remove blood clots in Kansas.

RELATED: 9-year-old boy opens lemonade stand to raise money for his own adoption 

Since arriving at the hospital in July, Ulises has been able to stand, walk and even kick a ball. As a part of his therapy, Ulises has also been pushing a lemonade cart around the hospital, offering drinks to hospital staff.

“A lot of it, for him, is just that activity tolerance of being able to sustain walking for a long time,” Liz Pohlen, an occupational therapist at the rehabilitation center said.

The exercise has also earned Ulises some extra cash — about $85 total, his mom told ABC News. He said he plans to buy a remote-controlled Ferrari with the money. He’s hoping to go back home by mid-September.