We have a 3D printer at work that makes things out of acrylic. Technically, it's a prototyping machine, but the plastic is rigid and they've been using it to create functional lab equipment. The guys in the machine shop showed me what it can do and I was blown away. Not only can it make solid objects like forks and spoons, but it can make an adjustable crescent wrench (assembled!), and a model engine complete with crankshaft and moving pistons.
I can't wait until the prices drop on these things and they're available at home budget prices....
