This book offers new definitions, vocabularies and insights for "scribbling", viewing it as a fascinating and revealing process shared by many different disciplines and practices. The book provides a fresh and timely perspective on the nature of mark making and the persistence of the gestural impulse from the earliest graphic marks to the most sophisticated artistic production. The typical treatment of scribbling in the literature of artistic development has cast the practice as a prelude to representation in drawing and writing, with only occasional acknowledgment of the continuing joy and experiment of making marks across many arts practices. The continuous line the author traces between the universal practice of scribbling in infancy and early childhood and the work of radical creativity for contemporary and historical artists is original and clarifying, expanding the range of drawing behaviors to that of avant-garde painters, performance and the digital.