This model is controlled by a forklift NXT buttons and two touch sensors (one up and one down). Or programmatically (adding ultrasonic sensor).
The orange button is for the NXT robot to move forward, to the sides of the robot go sideways, and a light sensor is closest to the hand when he gets back.
The forklift has a "box" to carry the objects within it.
This project is an adaptation of an existing one, which is similar.
The programming is the right of the remote, and the left (next to photo) is common.