Spirograph Bruno Abakanowicz invented the Spirograph between 1881 and 1900. It was used for calculating an area delimited by curves. Drawing toys based on gears have been around since at least 1908, when "The Marvelous Wondergraph" was advertised in the Sears catalog. An article describing how to make a Wondergraph drawing machine appeared in the "Boys Mechanic" publication in 1913. The Spirograph itself was developed by the British engineer Denys Fisher, who exhibited at the 1965 Nuremberg International Toy Fair. It was subsequently produced by his company. US distribution rights were acquired by Kenner, Inc., which introduced it to the United
Denys Ovenden Denys Ovenden Denys Ovenden was born on April 1, 1922. His preoccupation with drawing began very early, since there are drawings on the fly-leaves of books from that period. His natural history interest began. Watercolor is the basic medium for his work, with occasional "gouache" for highlighting or detail. His preferred working surface is a "fashion" type board, "CS2 not surface" being the favorite. Reference sources are most important, and Denys uses a body-live, pinned or pickled, to work from, as pinned and set specimens can be misleading due to shrinkage, discoloration or loss of parts. He does use photographs