Ball Roller Coaster It will keep two balls busy rolling down the track over and over again. The ULTRASONIC sensor tells the NXT when to use the lift motor. - ppt download
NXT Ball Shooter
NXT User Guide
Blog – Page 12 – Robotsquare
NXT Ball Hunter
LEGO MINDSTORMS EV3 | I revised the building instructions for PONG3R - The ultimate ping pong robot | Facebook
Building Instructions in Robotics & STEM | FLLCasts