PingPongPlus is a digitally enhanced version of the classic ping-pong game. It is played with ordinary, un-tethered paddles and balls, and features a "reactive table" that incorporates sensing, sound, and projection technologies. Projectors display patterns of light and shadow on the table; bouncing balls leave images of rippling water; and the rhythm of play drives accompanying sound and visuals. In the process, this project explores new ways to couple athletic recreation and social interaction with engaging digital enhancements.