Cuusoo is a Japanese partner of the LEGO Group. They work with the LEGO Group to produce community supported sets. If an idea submitted to the website gains 10,000 (originally 1000) supporters, it stands a chance of being produced as an official LEGO product.
Cuusoo and LEGO started working together in 2008 and the scheme was launched worldwide on April 23 2011. In October 2011, it was announced that, starting in October, anyone could upload a creation to lego.cuusoo.com, and if their creation receives enough (10,000) supporters, it will be reviewed by the LEGO Group for a chance to be made into an official LEGO product. But recently it was announced that you have to be 18 to submit a project. The project is currently in open beta.