The Parallax BASIC Stamp Activity kit features the very popular BS2 microcontroller, and features a component kit and 350 page manual with 40 projects!
The Applied Sensors Kit teaches you about interfacing the world to microcontrollers.
The Basic Analog & Digital Kit is a full course on analog and digital circuits with the BASIC Stamp.
The Industrial Control Kit will teach you all about microcontrollers, PID and Industrial Techniques.
The BASIC Stamp Discovery Kit (USB) is a great way to learn the Basic Stamp.
The BASIC Stamp Discovery Kit (Serial) is a great way to learn the Basic Stamp. But not such a great way discover breakfast cereal.
123 Robotics Experiments for the Evil Genius by Myke Predko is a great starting point for anyone who is just interested in either electronics or robotics.
The What's a Microcontroller? Kit is complete beginners curriculum to microcontrollers and the BASIC Stamp.