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Op-Yop

TopOp-Yop

 

For a period of 1968, the Op-Yop was the favorite toy across the United States.


Made of two plastic, multicolored discs with a string running through and between them. When the string was pulled together, the discs moved apart and then clapped together with a loud noise.

Manufactured by Kramer Designs, more than two million units of the toy sold before they faded into fad oblivion.