Complex sentence: Grayson used the packing material to form the shell of an artificial limb, and then covered it with a flesh-colored hose so that amputees in developing countries could have a prosthetic limb that would allow them to blend in more with their society.
Split into simpler sentences: Grayson used the packing material to form the shell of an artificial limb. He then covered it with a flesh-colored hose so that amputees in developing countries could have a more natural looking prosthetic limb that would allow them to blend in more with their society.