No White Ink

Today I sat down and tried to make Noah's birthday party announcements. I had a vision of what I wanted. We are doing the rubber ducky theme and I wanted the invitations to be on a dark blue paper with a white bath tub, yellow duck, and light blue bubbles. Those things, I believe are still possible. However, I went to print out the party info on the computer and apparently computers do not print white ink. I never would have guessed that. So now I don't know what to do about the invite. Do Kinkos or Staples print white ink???? We shall see.