"The only bottleneck to providing material objects for free or next to free should be in finding raw materials that can be printed out, and as a start, there's

"The only bottleneck to providing material objects for free or next to free should be in finding raw materials that can be printed out, and as a start, there's lots of that filling up the world's landfills." Just to let you know, for desktop 3D printers like makerbot, you can print in either ABS or PLA. PLA is biodegradable and made from corn starch (iirc). While ABS (the plastic that legos are made from) smells like death when you melt it, PLA smells like popcorn. It doesn't have as wide as adoption as ABS at the moment since it's a little bit harder to work with. It tends to gunk up your extruder.