The one-armed robot glides slowly to the kitchen table. With its three fingers, it carefully picks up the bottle of apple juice and puts it next to the glasses on the tray in front of it. Then it glides back into the lounge and serves the drinks to the guests. This is how artificial assistants might work in future. Only 1.45 meters high, Care-O-bot 3 is the prototype of a new generation of service robots designed to help humans in the household. The quick-to-learn assistant was developed by research scientists at the Fraunhofer Institute for Manufacturing Engineering and Automation IPA in Stuttgart.