The Game Boy Advance SP was an improved version of the original "GBA". It has a clamshell design, which means you can fold it to make it smaller when you're not using it. It has a front-lit screen (better than the one on the Game Boy Light), which the Game Boy Advance did not have. It can play Game Boy and Game Boy Color games, along with the new cartridges introduced with the "GBA". A newer model, labeled the AGS-101, was released which had an even better backlight and very good contrast; some people say it is the best way to play Game Boy, Game Boy Color and Game Boy Advance games.