What is the most important benefits of 3-D printing is that it changes the way we make things. First, 3-D printing helps to make things in a cheaper way. For example, in China they use 3-D printing to build houses for people. According to the video, they printed 10 houses for less than $5000. Another example where three pending changes have been making is in the medical world. For example, doctors are using patients cells to make plastic ears, nose is and organs for transplant. Certainly 3-D printing is helping people around the world in a enormous ways