Bop It toys are a line of audio games where play consists of following a series of commands issued through speakers by the toy, which has multiple inputs including pull handles, twisting cranks, spin-able wheels, toggle switches - with pace speeding up as the player progresses.
Based on concepts originally patented by Dan Klitsner, Bop It was licensed to Hasbro and further developed there by a number of designers including Bob Welch. With newer versions, additional inputs have been added or altered such that units like the 2010 Bop-It! Bounce shares no inputs in common with the original 1996 Bop It.
Bop It has been identified as some of the more popular children's games on the market, and toy and game development researchers have pointed to the natural interactions between player and toy, and the ability of players to use the toy to revert computer gaming processes back into those that resemble non-mediated object play. Other studies have shown that it is the Bop It's ability to mimic engagement in social behavior that has led to its commercial successes.