The plural of block is bloxen. The singular of bloxen is bloxen.This is an interlocking castle block. It's the fundamental defensive model for playing Seej.http://www.s33j.netNo assembly required. Just print it and start playing Seej.Rules for Seej can be found at http://www.s33j.netThis bloxen makes a great calibration object for your printer; it's simple enough to print reliably but also has some interesting geometry on the locking mortises underneath. Bloxen are intended to fit together loosely so that your opponent has a sporting chance of knocking down your defenses.