Stretch Armstrong keeps best at room temperature. Stretch Armstrong is made of latex rubber filled with gelled corn syrup, which allows it to retain shape for a short time before shrinking to its original shape. An estimated 67 different versions from Japan, Germany, Italy, France, Australia, and other countries released Stretch Armstrong variations between 1976 and the 1990s. The last two were filled with a granular solid in place of the viscous liquid found in the other figures. A vacuum pump, which attached to the heads of these figures, removed the air from within, which "froze" the toy in its stretched position.
Kenner Products "updated" version was available at least as late as the mid-1960s. Kenner introduced its popular Girder and Panel building sets construction toy in 1957, the Give-a-Show projector in 1959, the Easy-Bake Oven in 1963, the Electric Mold Master also in 1963, the Spirograph drawing toy in 1966, and the Starting Lineup sports action figure collectible line in 1988. Kenner Products obtained the rights to produce Star Wars action figures and playsets for the "Star Wars" trilogy from 1976 through 1985. After Kenner acquired the license to produce "Star Wars" toys when the Mego Corporation rejected it in 1976, Kenner popularized