Modular castle kit - Lego compatible

UPDATE (feb 2017) This version is deprecated. If you start new, please take http://www.thingiverse.com/thing:2141175

"Blocks" that can be assembled into a large medieval castle, Lego-compatible size

Your choice:
* Print bricks with base platform attached
* Print stackable objects that you can put on top of a base plate
* Combine the two


I had the following in mind:

* Reduce print time.
* Provide incentives to be creative: kids can adapt and expand with their own bricks
* Should be easy to print
* Should be sturdy
* Should be expandable by people with minimal openscad skills (create your own blocks)

You don't need all the pieces. Look at them and decide. A single castle-tower.stl can do for starters. By XMas you should be done printing a reasonably impressive set :)

File names:
* By default, bricks have a flat bottom and are not stackable (easier to print).
* All files called *_legobase are stackable, i.e. can be put on top of a base plate or other pieces.