Abstract: The present invention pertains to a method and apparatus for building online games. In one embodiment, the method may include providing a user interface that facilitates user selection of parts, and placing a set of parts selected by a user in a three-dimensional (3D) world. The method may also include joining parts within the set based on their proximity to each other in the 3D world to form one or more models for a game, and sending a model file for each of these models to a server via a network for use by various users.