I've built my fair share of Lego kits. Of course, I would do so by following step-by-step instructions designed for small children. My creations were also quite stationary. Needless to say, I would never be able to build a Starcraft 2 Siege Tank, especially one that moves and transforms.

If you're feeling the block-building itch, you can find a list of the tank's parts here. Good luck with that.