Build a cute little robot rover.
Paul has recorded a guide on how to construct the line-following robot, as this is the most complex of all of our Cookbook builds.
Follow the video below to build your robot, making sure that you've got together all of the materials above first.
Use some dark-coloured electrical tape to create a track for your robot to follow. It'll work best if you use a white or lighter-coloured surface on which to stick the track, as this will provide more contrast for the light modules to detect.
Here's what ours looked like.
The robot uses the rainbow module to shine light downwards and then the light modules to detect light reflected back up to them. The amount of light reflected back will depend on whether the sensor is over the black line or the lighter-coloured floor, and the robot uses the two light sensors on either side to decide which way to move.