The Lego Ideas Building Contest was a contest on Roblox that started on June 7, 2014, and ended on July 18, 2014.
On June 7, 2014, Roblox announced on a blog post  that they were hosting a contest called the LEGO Ideas Building Contest. Users were supposed to come up with a concept for a LEGO Set, build and photograph their creation and then submit their project to Roblox. The winners would all receive a Red Builder's Top Hat.
In order for users to enter the contest first they had to create a LEGO set ROBLOX themed. Afterwards they had to photograph the LEGO set and then submit it on this website.
The winners were announced on August 20, 2014, on a blog post.