I would like to share my art and DIY project. Beatfly is a small illuminating blimp, whose light and movement can be controlled via various interfaces such as MIDI controller, iPhone, Flash interface on a web site, computer keyboard, mobile phones and voice, and music. It is based on Arduino and its technical resources are published as open source. Beatfly DIY kit is also available for $65 (You need Arduino FIO, XBees and other electronic parts too).