With time and effort, you can build enormous and complex buildings. There's a great deal of freedom with what you can do, as long as you have patience! Building is much like with Lego - you make stuff from a variety of bricks. For curious and technically confident children and teenagers, however, this may actually be a bonus. It's certainly kid-safe, but isn't really intuitive. The first thing that'll strike you about ROBLOX is that it's a bit awkward.