MojoKid quotes a report from HotHardware: Researchers at Disney Research and Carnegie Mellon University have been toying around with radio frequency identification (RFID) tags. RFID tags are typically used for high-tech inventory management in a variety of industries, but researchers concocted a way to make RFID technology feasible for interactive games using physical objects. Using a framework the researchers developed called RapID, they showed how inexpensive RFID tags can sense when a physical object is moved or touched in near real-time. The research team demonstrated a handful of use case scenarios. One included a tic-tac-toe board that mirrors the physical game on a computer monitor with added sound effects, while another demonstration showed users playing a Pong clone using real wooden sliders to control the onscreen action. What the researchers have done is no small feat. RFID was never intended for interactive toys, and wasn't built for real-time or near real-time responsiveness. RapID interprets the signals by weighing possibilities instead of waiting on confirmation from RFID tags. Most importantly, it reduces typical lag times from 2 seconds all the way down to 200 milliseconds.