We present a new way of conceptualising tangibles for learning. This scheme adopts Heidegger's analysis of the ways a user can treat a tool: either as 'ready-to-hand' or 'present-at-hand'. It also proposes two types of activity a learner can engage in when using a tangible: either exploratory or expressive activity. Finally, two types of models that a user can explore are proposed: theoretical and practical models. Examples from the literature are described in terms of this framework and an

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... ple is given from our own work of an attempt to use this conceptualisation in design.