User blog comment:Madlooney6/Models Tournament/@comment-9751413-20141024165836/@comment-5801603-20141025174248

Cardboard's stronger than you might assume. Mine can survive a drop from a second story window, better than LEGO and Knex can anyway. That's probably because they're light, but I usually put small weights in them, at the front so they don't rear up, as they have the wheels and everything, so You don't have to exclude damaging robots.