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From the introduction::"The main objective of this chapter is focused on how to exploit the evolution of technology to improve user interaction in game environments through digitalized objects with identifi‐ cation technology (such as RFID or Near Field Communication). Digitalized objects are used as interaction resources. They are used in conjunction with mobile devices providing the performance of tasks with a simple and intuitive gesture. In the first place, mobile devices offer sophisticated methods to provide users with services to make use of information and to interact with objects in the real world. In the second place, physical objects are associated with digital information through identification technologies such as RFID. In this context, physical mobile interactions allow users to play games through natural interaction with ob‐ jects in the real world. This chapter has six sections. Section 2 describes some concepts such as: Ubiquitous Computing, the Internet of Things and the types of interaction used in games. Section 3 presents the general infrastructure of RFID systems. In section 4, we de‐ scribe the development of two RFID games. In section 5 their advantages and disadvantages are presented. Finally, conclusions are set out in Section 6."

"We have created a suite of physical computing activity games for Humana's Innovation Center office space - using web-connected sensors embedded in clothing, mobile devices, toys, exercise equipment, home and office accessories and appliances, and even buildings themselves. These challenges encourage people to be more physically active through social web-based games. Each experience is connected to the Humana employees' RFID badges, which allows them to participate in scheduled events, accrue points, and win top scores. A major component of every one of these games is the social platform behind them, which has been proven to be a major motivator in building and maintaining enthusiasm for healthy living. The ideas are developed through collaborative brainstorms, facilitated by Tellart and including Humana Innovation Center personnel. Tellart then refines the ideas, proposing and implementing several of them per round as medium-fidelity prototypes for the office."