Spirograph a hypocycloid. Spirograph Spirograph is a geometric drawing toy that produces mathematical roulette curves of the variety technically known as hypotrochoids and epitrochoids. It was developed by British engineer Denys Fisher and first sold in 1965. The name has been a registered trademark of Hasbro Inc. since 1998 following purchase of the company that had acquired the Denys Fisher company. The Spirograph brand was relaunched worldwide with original product configurations in 2013 by Kahootz Toys. In 1827 English architect and engineer Peter Hubert Desvignes developed his "Speiragraph", a machine to create elaborate spiral drawings, intended to prevent bank note forgeries.
Toy soldier material, but the most common mass-produced varieties are metal and plastic. There are many different kinds of toy soldiers, including tin soldiers or "flats", hollow cast metal figures, composition figures, and plastic army men. Metal toy soldiers were traditionally sold in sets; plastic figures were sold in toy shops individually in Britain and Europe and in large boxed sets in the U.S. Modern, collectable figures are often sold individually. Scale for toy soldiers is expressed as the soldier's approximate height from head to foot in millimeters. Because many figures do not stand up straight, height is usually an approximation. Standard