A sequence of comments from an ElReg article:

Forget missiles. Just scatter Lego bricks on the battlefield. Probably against the Geneva Convention but who takes any notice of that these days?

We could just buy containers of Lego and drop them from the planes at the enemy.

Luckily for Denmark that they are such a strong arms industry.

Bombs are probably cheaper. Though the thought of soldiers stopping fighting to assemble Lego is amusing.