Inspired by Bridget Marzo’s story of Tiz & Ott''s Big Draw and a few drawing tips, young artists from all over the world grabbed a bunch of Tiz’s crayons, and Ott’s brushes and pens, and drew a pop-up 'Tiz and Ott Gallery' in Tate Britain. In less than 90 minutes, the frames of a brilliantly diverse new ‘gallery’ were filled with inventive scribbles, rich splodges, amazing abstracts, and a wealth of characters and story ideas.