Wizard101.com is an online, Wizard school adventure (ala Harry Potter) with collectible card magic, wizard duels, and far off worlds! The game allows players to create a student Wizard in an attempt to save Wizard City and explore many different worlds.
Wizard101.com is a freemium game. You can play in a limited area for free, then if you want to follow your friends in to another area you have to pay to unlock other areas.
If you want some weird Wizard101.com merchandise they have everything from DogShirts
To Postage Stamps.
The Game itself is part World of Warcraft part Pokemon.