Webkinz pets are plush pets that come with a secret code that you can enter on webkinz.com to play with a virtual version of the pet online. Webkinz World is a highly popular Internet destination since 2005 in the US and in other countries where the pets are sold in.
To enter the code, a Webkinz online account is required. Registration is completely free, but accounts are initially restricted. The registration of a secret code or becoming a deluxe member resolves those limitations so that all functionality becomes available on the website.