1. An RFID-tagged toy configured to be accessorized and personalized by a play participant as part of a wireless interactive game, said RFID-tagged toy comprising: a main body in the form of a doll, an action figure, or a stuffed toy, said main body comprising an inner portion and an outer portion and a first passive radiofrequency identification (â€œRFIDâ€) tag disposed in a cavity formed within said inner portion, said first passive RFID tag comprising: i) a microprocessor, ii) a first identifier configured to uniquely identify said main body, iii) non-volatile programmable memory, iv) a transceiver configured to provide two-way wireless communications with a compatible RFID reader device, and v) an antenna configured to be energized by an external electromagnetic field for powering at least said first passive RFID tag; and at least one accessory item configured to be selectively worn by, attached to, or assembled with, said main body, said at least one accessory item comprising a second passive RFID tag comprising a second identifier configured to uniquely identify said at least one accessory item; wherein a selection of information is stored in said non-volatile programmable memory, and wherein said selection of information comprises at least: i) a first selection of information comprising one or more traits, powers or skills relevant to said game, ii) a second selection of information comprising progress information relevant to said game, and iii) a third selection of information comprising information configured to be selected by said play participant.