Candy bars have been in existence for a long time—easily more than 150 years! Although certain candy bars come and go, some popular varieties have surprisingly been around since the early days.

Pioneered in 1978, the Whatchamacallit was a peanut butter and caramel candy bar that gained a lot of traction in the market during the 1980s. In 2009, the Hershey's trialed the Thingamajig.