I'm always amazed at what a Nintendo DS can do.  I'm even more impressed with the developers to have envisioned the DS as something more than a video game system.  People have been making some great things with the Flipnote software.  Take this for example.  Billy Polard created a music video for one of his original songs.  What better way to create a music video and not spend more that a couple benjamins to create it.  His style is very similar to the look of the Where the Wild Things Are characters.  Even though the video is simple,  I think it ties in very well to his simple and not blaring song.

Don't worry, if you're more into the action oriented type, Flipnote can do it, granted the person has to be skilled too.  The next video are a bunch of stick figures.  You might remember a few years back when flash was starting to be used as an animation tool.  They had a series with stick figures doing matrix style moves and martial arts.  Well this video seems to be a homage to it.  Check it: