Building  structures using LEGO bricks have always been a favourite game of kids. Since it is a manipulative game in which the kid can make use of his/her creativity in an effective manner, Lego building is regarded as a game which promotes child development.   Lego building also creates enough room for thinking for a growing child which helps him/her in nurturing his thinking skills. So our idea originated from this simple thought, what if we could re invent the LEGO building game in a virtual space without compromising much on the physical experience of building the structures? We realized that many of the limitations of the physical LEGO building could be solved with a virtual lego building game. In addition to rectifying the limitations, we could also add new features which would never be possible with the physical LEGO building games.  The objective of  our project is to come up with a mixed reality LEGO building game called  ‘ Lego World’  which allows kids to collaboratively build lego structures from two different places over the network.