Monica Gori, IIT Italian Institute of Technology, DIST University of Genoa Michela Del Viva, Department of psychology University of Florence, CNR Pisa Istituto di Neuroscienze Giulio Sandini, IIT Italian Institute of Technology David Burr, Department of psychology University of Florence, CNR Pisa Istituto di Neuroscienze Five and six-year-old children do not integrate visual-haptic information optimally