Her husband, an engineer, conceived of the toy in 1943 while working at Cramp Shipbuilding Yard in the Port Richmond section of Philadelphia after a torsion spring fell off a table and started flipping end-over-end across the floor.
His spouse, an engineer, conceived of the toy in 1943 while working at Cramp Shipbuilding Yard in the Port Richmond section of Philadelphia after a torsion spring fell off a table and started spinning end-over-end across the floor.