Jenga An iOS version exists, released in late 2010 by NaturalMotion Games. NaturalMotion has also released versions for Android phones and Mac computers. Jenga Jenga is a game of physical skill created by Leslie Scott, and currently marketed by Hasbro. Players take turns removing one block at a time from a tower constructed of 54 blocks. Each block removed is then placed on top of the tower, creating a progressively taller and more unstable structure. The name "jenga" is derived from "kujenga", a Swahili word which means "to build". Jenga is played with 54 wooden blocks. Each block is three times
Starting blocks start of races. This was not the most consistent or stable system. It also was destructive to the track surface with the holes having to be filled for subsequent runners. When George Simpson became the first person to run 9.4 seconds for the 100-yard dash in 1930, his record was disallowed because he used starting blocks. Wood was the first material used, with some tracks having permanently placed wooden starting blocks as built in structures at the start line. Portable blocks were held by long metal spikes that needed to be pounded into the ground. These devices evolved to metal