Before revision:  We introduce {\em   a novel intrinsic reward, called causal curiosity, and show that it allows our agents to learn optimal sequences of actions , and to discover causal factors in the dynamics  .
After revision:  We introduce {\em causal curiosity a novel intrinsic reward, called causal curiosity, and show that it allows our agents to learn optimal sequences of actions , and to discover causal factors in the dynamics .