We discuss the properties of controllability and complexity in novel o
bject enrichment, their definition and present a critique of previous
work related to them. We address the relationship between control and
complexity the evolutionary basis of their attractiveness and suggest
that the acquisition of control may be a more enriching process than i
ts execution. We propose that, although little work has been directed
at separating their relative contributions to enrichment, controllabil
ity appears more important than complexity. We discuss the ways in whi
ch objects can be responsive both in terms of the predictability of th
e response and the 'grade' of actor-object interaction.