Imagine running around in a 3D world building stuff out of legos. Then go download blockland and have fun playing around. This is actually pretty cool stuff and is perfect if you’re looking for something non-violent for your kids to dink around with on the computer. It’s also free and built on garagegame’s Torque engine, so in theory should work on all platforms, though for now the main developer is only releasing win32 binaries. There are links in the forums to OS X binaries that others have put together. I’m testing this on my home windows box, I might pop up a server for folks to play with during the day while I’m at work.