Have you ever broken a small plastic part off of something and wished you could just replace that one piece rather replacing the whole item? In three to five years you may be able to do just that and, better yet, from the comfort of your own home. Three dimensional printers, also called rapid prototypers, once cost around 100,000 USD and could only be seen in industrial design shops. Soon, however, they will begin making their way into consumer's homes. Desktop factory, a company started by IdeaLab, will start selling its first printer this year for around 5,000 USD. It will be compact enough for home offices, measuring 25 by 20 by 20 inches and weighing only 90 pounds. In theory, this would allow you to download plans from the internet for whatever part you might need and print it within a short period of time.