Program your robot to navigate the perils of the Robot Obstacle Course...and watch out for those trap doors! Your mission: choose an ultra-secure password and gain high-level security clearance as you enter the Password Security Agency. Explore some of the ways that people have communicated throughout history, and learn how these technologies have changed our world, at the Gallery of Communications. Learn how computer pointing devices work with the Giant Trackball activity. Try our Resolution and Color Depth activity. Learn how the millions of colors you see on computer monitors and TV's are created - check out our Color Mixing activity. Computers use binary math to calculate. Now you can too, with our Binary Balance activity. Note: to play these online activities, you'll need the free Macromedia Flash plugin.