Spinjas was one of my favorite toys growing up in the late eighties. Basically Spinjas was a set of spinning top warriors that you put in to an arena and watched them fight. Similar to Battling Tops.
I had the light blue arena with two launchers and maybe 6-8 of the warriors. You could pack the warriors in the arena and use it as a carrying case so you could bring this toy with you on boring trips. All you needed was a flat surface to play.