What Would You Most Like to See Printed in 3D?

Right now, strange and spectacular 3D-printed objects are proliferating in the tech and design worlds. Butt plugs, cakes, brains, scaled models of Fenway Park. There is seemingly no object that a 3D printer won't try. What would you, our readers, like to see printed in 3D? Please, share your answers and ideas in the comments!