1. Welcome to Mindstorms -- 2. Hank, the Bumper Tank -- 3. Trusty, a Line Follower -- 4. Not Quite C -- 5. Minerva, a Robot with an Arm -- 6. pbFORTH -- 7. A Remote Control for Minerva -- 8. Using Spirit.ocx with Visual Basic -- 9. RoboTag, a Game for Two Robots -- 10. legOS -- 11. Make Your Own Sensors -- A. Finding Parts and Programming Environments -- B. A pbFORTH Downloader -- C. Future Directions.