Bit expensive, but how fun would this be! It creates 3D models of anything you like by feeding and heating up a line of plastic, then builds the model up layer by layer.
RoboSavvy UK - Store
The MakerBot Thing-O-Matic 3D printer is the new 3D printer from the popular Makerbot Industries. Makerbot 3D Printers are extremely popular in the US for their low cost, good quality printers and Robosavvy is proud to be first to bring to the UK.