The Mindstorms kits, a few pounds of technic parts are also pretty good for dipping your toe into robotics. The Mindstorms have instructions on building line-fo

The Mindstorms kits, a few pounds of technic parts are also pretty good for dipping your toe into robotics. The Mindstorms have instructions on building line-following cars and a variety of other things. I have fond memories of hacking together a 10 dpi photocopier using the light sensor and a few motors.