A 13-year-old invented a new technology to help his grandma. It actually works.

At just 13 years old, Kevin Tang is establishing himself in the world of science and senior care − all with the goal of keeping his grandma safe.

The Southern California eighth grader just won $25,000 and the title of "America's Top Young Scientist" for his fall detection invention, a monitoring device for seniors . It's different from Life Alert and other brands that offer devices seniors wear around their necks, in their pockets or on their wrists. Kevin's invention, FallGuard , is a camera monitoring system with an algorithm he programmed to identify falls and alert caregivers .

Kevin's device isn't wearable. Instead, users set up FallGuard cameras around their home that connect to a small computer to monitor for falls.

He's working to keep his device free, or at least on t