Card Buggy Click the images to download ‘Crumble Card Buggy’ Instructions for setting up the Card Buggy. ‘Ultrasonic Distance Sensor’ Instructions for setting up the Ultrasonic Distance Sensor. ‘Micro Switch’ Instructions for setting up the Micro Switch. ‘Line Follower’ Instructions for setting up the Line Follower. ‘Line Drawing’ Instructions for setting up the Card Buggy for line drawing.. ‘Getting It Moving’ The basics of getting your CRD Buggy built and moving about. ‘Line Drawing’ Getting the buggy to draw shapes. ‘Bump and Reverse’ How to turn your buggy into an obstacle-avoiding autonomous vehicle. ‘Reverse Parking Sensor’ Make an audible alert when you get too close to an object. ‘Line Following’ Getting your CRD Buggy to follow a black (or white) line. ‘Possible Solutions’ Examples of programming solutions for the various activities. More Crumble Projects