- What is the most interesting thing you have seen done with a 3D printer or 3D printing technology?

i think the most interesting thing i'll ever seen done with a 3d printer is a human arm as a prosthesis
i'm really wondered on how a 3d printer may change some life, i've seen arms done with 3d printer, arduino,raspberry and with mind control, i'm pretty interested doing it! and i'll if i'll win!

- If you could build your dream 3D printer, what would it include and what would it do? Let your imagination run wild!
It would have multiple extruders, printing with different color and nozzle size! also i little bit faster