For families of children with disabilities, one of the biggest difficulties is the expense involved in giving them options, like prosthesis or wheelchairs, to help them live fuller lives. These aids can cost several thousands of dollars, and then there's the problem of the child quickly outgrowing it (as children tend to do with just about everything).
Keeping this in mind, a team of engineering students at BYU have come up with a brilliant design for a wheelchair, made largely out of inexpensive PVC piping. This drastically cuts the cost and has the added advantage of being easily adjustable, to expand as the child grows. As if that wasn't enough, they're releasing the design on the internet for free so anyone can make it themselves.