Line Following Robot Kit
I put together a line following robot kit I bought off Amazon. Great for an adult and a youngster working together. You can have a lot of fun and learning putting this kit together and understanding the theory behind the way the LDRs (Light Dependent Resistors) detect the difference between the black of the line and the white of the area outside the line. And the way this information is used to keep the Robot Car on the right path.
Kit Link: http://amzn.to/2ALyb9K