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 attachment demonstrates pushing and pulling with a circular motion. It is useful for FIRST LEGO League competitions where you can grad a mission model and bring it back to base or push/pull on a lever.
This 3D building instruction is about a FIRST LEGO League 2020 mission called the Slide mission. To accomplish the mission the LEGO Robot must take two LEGO minifigures from a slide and bring them back to base. The whole attachment is built only with parts from LEGO Mindstrorms Robot Inventor Set.