Happy Ghasts and Minecraft® action in the lush cave The Ghast Station (21597) is a LEGO® Minecraft® building set that lets you splash down the waterfall into a cave. This set is a great gift idea for children ages 9 and up. Children join 2 skeletons, a dried ghast, hydrated ghast, ghastling, happy ghast, ghast keeper and an aeronaut as they mine, battle, build and fly.