World of Cars Online, an MMO for the younger set, has entered open beta. It's free-to-play, with the option to subscribe for access to higher levels in minigames and better items here and there. The game allows you to design your own car, have a house (garage), participate in races, and more.
The monthly sub fee -- referred to as a sponsorship -- is $5.95 USD, and as with many games, if you show some support via your wallet by subscribing during beta, you'll get some goodies at launch in addition to the normal sponsorship perks, such as a special paint job and license plate.)
Check out the official site for all the details.