Ivan is a 91 year old survivor of four concentration camps, including Auschwitz and Bergen-Belsen, and of the death marches before liberation. In his extraordinary life he went on to become the founding director of the Museum of Science and Technology, Tel Aviv and award-winning inventor of educational games, with more than 100 to his credit in all. He is also the author of more than 50 books of games and puzzles and is still writing in his ‘retirement – most recently published are The Puzzle Universe and his best-selling title The Big Book of Brain Games, which remains a best seller for its category on Amazon. He is currently working on a book on creativity, a subject he considers the most important force in his life. The Harmonograms, which are all unique drawings, were exhibited the world over including the ICA, London; the International Design Centre, Berlin; the Museum of Modern Art, Mexico City; the Didacta Exhibitions in Basel and Hannover; and the Israel Museum, Jerusalem.