Crazy Bones was an extremely popular game in the US during the mid 90's. The game involve bouncing small plastic figurines. (Many times just the head of the character.) There are still Crazy Bones being produced in some parts of the world today, but it's no where near as popular as it once was. Crazy Bones came out with their Dragonball Z line in May of 2000, and the set consisted of 40 different figures total. A full list of all the DBZ characters produced by Crazy Bones can be found on their official site, here: http://www.crazybones.com/whoswho/dragonball_z.htm