Okay, enough wasting time playing video games and watching lolcat videos on YouTube. It is time to put those brain cells to work, and in order to do that, we have selected 10 creativity apps for iPhone and Android. But what could you possibly create with a mobile device? Quite a lot, as it turns out: pretty drawings, lively music, even complex 3D models and interior designs. Just flick through the slideshow below and check out any of the apps that spark your interest. Can you think of a great creativity application that we should have included? Then don't hesitate to let us know by dropping a comment below.