Build it up and let it steam! This robot emits small clouds of water vapor through the ultrasonic nebulizer in its chimney, illuminated moodily by an LED. Pure steampunk atmosphere! But how exactly does its machine work? And what is the difference between fog, steam, and smoke? The instructions explain it. Before Rufus can start steaming, he is assembled by the children from over 100 individual parts. The movable needle for the pressure gauge display is particularly cool, perfectly enhancing Rufus's appearance. Three different modes can be selected: whether as a walking robot, a moving train, or a steaming machine, the intricately designed parts instantly transport children into a fascinating play world full of steam and gears.