1. A stuffed toy having internal memory and wireless capability for storing and wirelessly communicating selected information relevant to a game played by a game participant using said stuffed toy, said stuffed toy comprising: a toy body comprising a fabric material forming a soft outer skin of said stuffed toy, and a stuffing material filling an interior space contained within said soft outer skin of said stuffed toy; a passive radiofrequency identification (“RFID”) tag disposed within said interior space and supported by a support structure comprising a stiff plastic sheet substrate, said RFID tag and support structure arranged in a manner so as not to expose sharp surfaces that could poke or puncture said soft outer skin; said RFID tag comprising: i) a processor, ii) a unique identifier configured to uniquely identify said stuffed toy, iii) non-volatile programmable memory configured to store game-relevant information, iv) a transceiver configured to provide two-way wireless communications with a compatible RFID reader device, and v) a spiral-wound antenna electrically coupled to said transceiver and configured to be energized by inductive coupling with said compatible RFID reader device; and wherein said game-relevant information comprises at least: i) a first selection of information comprising one or more in-game powers or skills associated with said stuffed toy, ii) a second selection of information comprising in-game points or levels reached, and iii) a third selection of information comprising a personalized name of said stuffed toy.