Take cover men, the enemy is right at our doorstep! When it comes time for young siblings and friends to set aside their affable demeanor and choose opposing sides all in the name of fun, there's a good chance someone has built them the Big Backyard Stronghold play-set plan. Packed with loads of ways to climb, hide and interact with, this big 16x21 play fort will make for a fun and exciting skirmish into imaginative play. A Medieval remix of our Twin Peaks playset, the four main towers, each…