LEO is a walking, talking robot who happens to be able to print ( in plastic ) any object that Carla draws.
The other robots in the book have their own special capabilities: H1-H0 prints in metal, Sinclair can find and print objects from a huge catalogue of designs, and the others ( including AL1C3-D, IRIS-7, and NiXie ) have unique talents, too.
Readers can come along for the journey, too: all of the objects in the book are printable one way or another.
All and all a great way to introduce children to the world of 3D printing. Pick it up at your local bookstore now.