Looking without seeing: Children do not distinguish efficient from inefficient means to achieve a goal Ori Ossmy 1 , Danyang Han 1 , Brianna Kaplan 1 , Melody Xu 1 , Catherine Bianco 1 , Roy Mukamel 2 , Karen E Adolph 1 1 Department of Psychology and Center for Neural Science, New York University, New York, NY, United States. 2 School of Psychological Sciences and Sagol School of Neuroscience, Tel-Aviv University, Tel Aviv, Israel.