Novel Tangible Interfaces for Physical Manipulation , Conceptual Constructions and Action Composition

I-BLOCKS are an innovative concept of building blocks allowing users to manipulate conceptual structures and compose atomic actions while building physical constructions. They represent an example of enabling technologies for tangible interfaces since they emphasise physicality of interaction through the use of spatial and kinaesthetic knowledge. The technology presented in this paper is integrated in physical building blocks augmented with embedded and invisible microprocessors. Connectivity and behaviour of such structures are defined by the physical connectivity between the blocks. These are general purpose, constructive tangible user interface devices that can have a variety of applications. Differently from other approaches, I-BLOCKS do not only specify a computation that is performed by the target system but perform at the same time the computation and the associated action/functionality. Manipulating I-BLOCKS do not only mean constructing physical or conceptual structures but also composing atomic actions into complex behaviours. The concept is illustrated by story telling performed through the construction of physical characters exhibiting emotional states. The paper reports briefly about informal trials conducted with children.