(IMAGE) Université de Genève Caption One of the 3D modules in the book: a miniature staircase to be climbed with the index and middle fingers. A footstep sound is made each time the fingers touch the module. Credit © Dannyelle Valente / SMAS / Les Doigts qui rêvent Usage Restrictions none License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.