The present invention relates to a robot comprising a horizontal or horizontally slanted transparent experiment layer being adapted to support items at arbitrary positions on or in the experiment layer, and a moveable sensor arranged below the transparent experimental layer said sensor being configured for providing a sensor signal indicative of item(s)' location on the experiment layer, an actuator arranged for being moved into different positions above the horizontal transparent layer a display device being configured for visually representing located item(s) a user input device configured for receiving information as to operation of the actuator.