Welcome to the Robotics Challenge
The build guide for the robot is here:
You should be able to build that from that. The line follower kit is there, you just need two pillars and a couple of screws. I’ll do a separate post for the wiring.
The code is on the 4tronix site – its also on the dropbox site. Login details are in the email
Attaching the ultrasonic sensor – use a rubber band or the adhesive pad – either is fine.
Ultrasonic sensors with rubber band.
Line follower – wiring will require longer dupont cables back to Arduino.
Ultrasonic sensors with sticky pad
Sticky pad works fine