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 include the Plastic Warrior Show, which is the oldest established show in the U.K. Beginning in 1985 and still being held annually in Richmond, South London. Another well known show is the London Toy Soldier Show held in central London (now owned and operated by the magazine Toy Soldier Collector), the Miniature Figure Collectors of America (MFCA) show in Valley Forge, the Chicago Toy Soldier Show (OTSN) in Illinois, the East Coast Toy Soldier Show in New Jersey, the West Coaster Toy Soldier Show in California, the Sammlerbörse (Collector's Market) in Friedberg, Germany and the biennial Zinnfigurenbörse (Tin Figure Market)