Disney Tsum Tsum is the name of a range of collectible stuffed toys based upon popular Disney characters (including characters from the Disney-owned Star Wars and Marvel franchises). The name is derived from the Japanese verb tsumu meaning “to stack”, because the toys are designed to stack on top of each other, forming a pyramid shape.
The toys were first released in Japan in 2013 as a tie-in to the Tsum Tsum arcade and mobile games developed by Konami and Line Corporation. Disney began to sell them in the United States in July 2014, and in Disneyland Paris the following month. Around the same time, Disney released Tsum Tsum to the South Korean market, giving away icons for use on online chat systems. As of 2014, 1.8 million Tsum Tsum toys have been sold.(source:wikipedia)