The Take-A-Seat chair, brainchild of Jelte van Geest of Eindhoven Design Academy, plays upon the concept of interactive mobile seating, making sure that your rear end will be in its proper resting spot at all times as you peruse through tome after tome. The chair itself houses an RFID card, where it will activate to closely follow you through the library, ensuring there is a place for you to sit at all times. Once your physical presence leaves the range of its service, it will head back to its original spot in a haunting session. I don’t think this would be suitable for use in a library though.
Source: American Inventor Spot