Roblox Corp. secured $2.2 million for Roblox, its virtual world and casual game emphasizing user-generated content, with Altos Ventures and First Round Capital participating in this recent round of funding, according to an SEC filing reported by PaidContent.

Still in its public alpha testing phase, Roblox invites children to create customizable avatars, construct virtual environments, and build and play games in the world of Robloxia.

Players can purchase and sell their creations for Robux, Roblox's in-game currency, and buy more Robux with real world money. The company takes a ten percent sales tax on all items sold through its catalog.

Though Roblox is free to play, the virtual world offers two tiers of paid membership, a Builder's Club for $6 a month and a Turbo Builder's Club for $12 a month, which give subscribers extra privileges, virtual gifts, and a daily Robux allowance.