Mateo loves making up stories and today he will live the most surprising one. His grandmother is taking him to the Thyssen-Bornemisza Museum and he is not much amused by the idea, but... He still doesnt know there is a surprise waiting for him inside! A blue little horse will take him to know the paintings in the most special way. This book is a walk around 22 works of art to bring the museum collection closer to the children.