What is a robot, and how small can robots be? Are there robots the size of a hand? How about the size of a strand of hair? Can a robot be as tiny as a single molecule? Learn what makes a robot a robot, then step down in size and find out which robots are real and which are science fiction. This children's book is available in hardcover, softcover and digital download via www.lulu.com and www.amazon.com. See Resources tab for links.