Building Instructions

- you should attach it to the motor, depending on the orientation of the motor

This is the initial construction of a catapult. The base on which we will place the rest of the robot. The goal of this construction is to give the catapult the ability to rotate.

It's the third version of the VEX IQ Easy Bot with rotated Robot Brain and castor wheel.

Building instructions for a VEX IQ attachment for throwing balls with rubber bands.

LEGO Mindstorms Robot Base for a high placed attachment for containing ping pong balls. It is interesting how the balance is achieved with such an attachment. It was only one of the version in a series of LEGO Mindstorms Robots for World Robotics Olympiad.

- you should attach it to the motor, depending on the orientation of the motor.

This construction uses a differential. Both wheels could turn with different speed and this makes a construction much more stable when turning. 

Attachment for lifting object, especially hex balls if you have them from the Crossover competition.

Building instructions for a LEGO Mindstorms EV3 Truck Robot Attachment for the FIRST LEGO League 2013 Nature's Fury robotics competition

Building instructions for the Rubber Band Attachment

- note that you could attach it to the brick both sides, depending on which technique you would like to test. Use the video as a reference.