This may be the golden age for "do-it-yourself". We are all creating and distributing objects, images, sounds and text in ways that not long ago required the direct, hands-on involvement of experts. "DIY" is behind the growth of blogs (e.g. Wordpress), self-publishing (e.g. Lulu), music-recording (e.g. Garage Band), podcasts (e.g. iTunes), and the emergence of a whole new category of celebrity - YouTube stars. 3D printing, in which successive layers are built up into objects under the control of a computer, appears to be next.