A system for video game physical interaction is provided for a host device with an associated interactive application by a plurality of physical building blocks each having at least one input connection point and one output connection point operable for connection to one or more of the remaining blocks. Detectable connection paths through the plurality of blocks allow determination of the shape of a structure created by the blocks and interfacing of the connection paths of the plurality of blocks to the host device creates an input to the interactive application. The application is then altered responsive to the connection paths.