These are all the robot building instructions. By visiting each building instruction you could see the Tutorials and Courses and Lessons in which it is used.
This module is made as a grabber that uses a cool mechanism to catch things vertically. It is powered by a medium motor. The grabber is used in Earl Bot - Grabbing and Clearing LEGO Mindstorms Robot without wheels.
It moves and it collects. It collects objects.
These are building instructions for a LEGO Mindstorms robot that could collect objects. It is not actually catching them and that's why we call it "Simple Catch Bot". The general case is to program it to move on the floor and collect some of the Mindstorms wheels and tires coming with the 45544, 45560 or 31313 LEGO sets.
Building instructions for the LEGO Mindstorms EV3 robot used for accomplishing WRO 2014 mission. It is the full robot with the lift at the top
Building instructions for a robot for the World Robotics Olympiad Sputnik competition. This is the light version without the lift at the top.