The Castle Winterhawk base set has everything you need to make massive castles or keeps. This set includes our innovative DRAGON LAYERS options which allows you to customize your models before printing. Add snow, icicles, vines, bushes, stains and more (even yellow puddles in the snow, if you know what we mean), all with a few easy clicks. Best of all the entire set is E-Z LOCK compatible, making building and take down a snap using common bobby-pins for all connections, and everything comes apart for easy storage.