Brick Battles is a fun little game for fighting battles with Lego® toys. Or a different brand. Or anything,
really. But I wrote it with Lego in mind. It is available free as a pdf here. I also have
little pocket versions of the rules available at
Indie Press Revolution.
Brick Battles is loads of fun for kids and grownups alike, and has been a big hit in the minis hall at Gencon every time I bring it. Someday, I
will may get around to (but probably not) writing up the already-existing Very Large Armies rules supplement, and
provide it in the same formats (free .pdf and little book for $5).