Takara Tomy released a new set of tiny Nintendo DS game carrying cases with art from New Super Mario Brothers. Each one costs 200 yen ($1.61), but you don’t get to pick which one you get. They’re gashapon toys, so you could get the awesome cover art with Mario and Luigi or get stuck with the ugly brick. Next month Takara Tomy has a bunch of Pokemon DS game carrying cases and you can see those past the break.
Edit: Each case stores three games. Thanks for the info Amy!