In the decades following the release of Simon, numerous clones and variations were produced including Merlin among others. Beginning in 1996, Milton Bradley and a number of other producers released the handheld Bop It which featured a similar concept of a growing series of commands designed to test eidetic memory. Bop-it FAQ from World of Tim (personal website) Other related games soon followed including Bop It Extreme (1998), BopIt Extreme rules and assembly instructions from World of Tim (personal website) Bop It-Extreme 2 (2002–2003), Zing-It, Top-It, and Loopz (2010)http://www.playloopz.com/ Loopz's Official Website
