The sets contained a variety of objects including interlocking rings, playing cards, and a magic wand.

Gilbert and his wife Mary developed cardboard prototypes to get the right sizes, openings, and angles to create a robust buildable girder pattern.

[2] In 1920, the company began selling regenerative vacuum tube radio receivers designed by the C. D. Tuska Company, and the following year, in order to increase interest in radio, began operating station WCJ, which was the first broadcasting station licensed in the state of Connecticut.

The instruction manuals were co-edited by a Sterling Professor at Yale university and one of his graduate students.

[11][12] A line of inexpensive reflector telescopes followed the Sputnik-inspired science craze in the late 1950s.