Sit 'n Spin is a popular toy of the 1970s and 1980s. Introduced by Kenner Toys (later bought by Hasbro

Hasbro

Hasbro is a multinational toy and boardgame company from the United States of America. It is one of the largest toy makers in the world. The corporate headquarters is located in Pawtucket, Rhode Island, United States...

) in Cincinnati, Ohio

Cincinnati, Ohio

Cincinnati is a city in the U.S. state of Ohio. Cincinnati is the county seat of Hamilton County. Settled in 1788, the city is located to north of the Ohio River at the Ohio-Kentucky border, near Indiana. The population within city limits is 296,943 according to the 2010 census, making it Ohio's...

, it was invented by Jacob W Burkart Sr and John F Mayer, in 1973, in Kenner's engineering department . It came in a multitude of visual designs however all were multicolored (using some or all of the primary color

Primary color

Primary colors are sets of colors that can be combined to make a useful range of colors. For human applications, three primary colors are usually used, since human color vision is trichromatic....

s red, yellow, blue). It features a large circular two-part plastic

Plastic

A plastic material is any of a wide range of synthetic or semi-synthetic organic solids used in the manufacture of industrial products. Plastics are typically polymers of high molecular mass, and may contain other substances to improve performance and/or reduce production costs...

 base. One part is in contact with the ground, and is connected to a smaller concentric

Concentric

Concentric objects share the same center, axis or origin with one inside the other. Circles, tubes, cylindrical shafts, disks, and spheres may be concentric to one another...

 plastic disk above it. The other part of the base, another concentric circle, is free to spin about the axis. A child sits on this part of the base, cross-legged and straddling the pole, and turns the disk, spinning the child in the other direction.