ROBLOX Virtual Playworld.
ROBLOX is a free online building game. You make your own games, and share them with other people.
-Create buildings, vehicles, scenery, and traps with thousands of virtual bricks.
-Visit your friend's place, chat in 3D, and build together.
-Play with the slingshot, rocket, or other brick battle tools. Be careful not to get "bloxxed".