A computer system provides a virtual world. The computer system includes a server subsystem serving virtual world data, via a communication network, and receives data and/or commands. A registration subsystem, coupled to the server subsystem, verifies information from a toy, registers the toy, and determines a quantity of toys registered by a user who is registering the toy. The verifying includes determining the validity of the information. A virtual world providing subsystem, coupled to the server subsystem, provides the virtual world data, which produces data that presents the virtual world. The virtual world data includes a virtual toy representing the toy and a reward provided to the user for registering the toy. The reward is based on the quantity of toys previously registered by the user, such that the reward received for registering the toy is different than another reward previously received by the user for registering another toy.